diff --git a/source/libublsettings.c b/source/libublsettings.c
index 29e8a0a..a566551 100644
--- a/source/libublsettings.c
+++ b/source/libublsettings.c
@@ -229,7 +229,6 @@ void *yon_dictionary_free_all(dictionary *dictionary_to_free,void (*data_manipul
             if(data_manipulation)
                 data_manipulation(dict->data);
             if(dict->prev)
-                free(dict->prev->key);
                 free(dict->prev);
         }
         free(dict);
@@ -408,7 +407,7 @@ int yon_char_find_last(char *source, char find){
     return i;
 }
 
-char *yon_char_append(char *source, char *append)
+char *yon_char_append(const char *source, const char *append)
 {
     if (source && append)
     {
@@ -421,7 +420,7 @@ char *yon_char_append(char *source, char *append)
         return NULL;
 }
 
-char *yon_char_new(char *chr)
+char *yon_char_new(const char *chr)
 {
     if (chr){
         char *newchar = malloc(strlen(chr) + 1);
@@ -432,7 +431,7 @@ char *yon_char_new(char *chr)
         return NULL;
 }
 
-char *yon_char_unite(char *source, ...){
+char *yon_char_unite(const char *source, ...){
     if (source){
         va_list arglist;
         char *new_char=NULL;
@@ -555,28 +554,28 @@ char *yon_char_from_float(float int_to_convert)
 
 char *yon_char_from_double(double int_to_convert)
 {
-    int negative = int_to_convert < 0 ? 1 : 0;
-    int digits_before_decimal = (int_to_convert == 0) ? 1 : (int)log10(fabs(int_to_convert)) + 1;
-    int total_length = digits_before_decimal + 1 + 2 + negative + 1;
-    char *ch = malloc(total_length * sizeof(char));
-    if (!ch) {
-        return NULL;
+    int i = 1;
+    double convert_check = (double)int_to_convert;
+    for (i = 1; convert_check >= 10; i++)
+    {
+        convert_check = convert_check / 10;
     }
-
+    char *ch = malloc((i + 9)* sizeof(char));
+    memset(ch,0,(i + 9)* sizeof(char));
     sprintf(ch, "%.2f", int_to_convert);
     return ch;
 }
 
 char *yon_char_from_long(long int_to_convert)
 {
-    int negative = int_to_convert < 0 ? 1 : 0;
-    int digits = (int_to_convert == 0) ? 1 : (int)log10(labs(int_to_convert)) + 1;
-    int total_length = digits + negative + 1;
-    char *ch = malloc(total_length * sizeof(char));
-    if (!ch) {
-        return NULL;
+    int i = 1;
+    double convert_check = (double)int_to_convert;
+    for (i = 1; convert_check >= 10; i++)
+    {
+        convert_check = convert_check / 10;
     }
-
+    char *ch = malloc(i * sizeof(char) + 1);
+    memset(ch,0,i * sizeof(char) + 1);
     sprintf(ch, "%ld", int_to_convert);
     return ch;
 }
@@ -585,6 +584,7 @@ char *yon_char_replace(char *source, char *find, char*replace){
     if (!strstr(replace,find)){
         char *final=NULL;
         char *temp=NULL;
+        if(!strstr(replace,find)){
             while ((final=strstr(source,find))){
                 temp=malloc(strlen(source)-strlen(final)+strlen(replace));
                 memset(temp,0,strlen(source)-strlen(final)+strlen(replace));
@@ -592,6 +592,8 @@ char *yon_char_replace(char *source, char *find, char*replace){
                 temp=yon_char_append(temp,replace);
                 source=yon_char_append(temp,final+strlen(find));
             }
+            
+        }
     }
     return source;
 }
@@ -619,23 +621,16 @@ char **yon_char_parse(char *parameters, int *size, char *divider){
 }
 
 char **yon_char_parsed_rip(char **char_string, int *size, int item_to_delete) {
-    if (char_string && size && (*size) > 0 && item_to_delete >= 0 && item_to_delete < (*size)) {
+    if (char_string && size && (*size) > 0 && (*size) > item_to_delete && item_to_delete >= 0) {
         char **new_char_parsed = malloc(sizeof(char*) * ((*size) - 1));
         if (!new_char_parsed) {
             return NULL;
         }
-
+        
         int new_index = 0;
         for (int i = 0; i < (*size); i++) {
             if (i != item_to_delete) {
                 new_char_parsed[new_index] = yon_char_new(char_string[i]);
-                if (!new_char_parsed[new_index]) {
-                    for (int j = 0; j < new_index; j++) {
-                        free(new_char_parsed[j]);
-                    }
-                    free(new_char_parsed);
-                    return NULL;
-                }
                 new_index++;
             } else {
                 free(char_string[i]);
@@ -975,8 +970,8 @@ config_str yon_dir_get_contents(char *dir_path, int *size){
         DIR *directory = opendir(dir_path);
         struct dirent *de;
         while ((de = readdir(directory))){
-            if (dir){ dir = yon_char_parsed_append(dir,size,de->d_name);
-            } else dir = yon_char_parsed_new(size,de->d_name,NULL);
+            if (dir){ dir = yon_char_parsed_append(dir,size,yon_char_new(de->d_name));
+            } else dir = yon_char_parsed_new(size,yon_char_new(de->d_name),NULL);
         }
         closedir(directory);
     }
@@ -1284,16 +1279,10 @@ int yon_config_command_prepare(config_str *commands, int *commands_size,char *co
             for (int j=5;j<parsed_size;j++){
                 int new_size;
                 config_str new_element = yon_char_parsed_new(&new_size,parsed[0],parsed[1],parsed[2],parsed[3],parsed[4],parsed[j],NULL);
-                char *full = yon_char_parsed_to_string(new_element,new_size," ");
-                *commands = yon_char_parsed_append(*commands,commands_size,full);
-                yon_char_parsed_free(new_element,new_size);
-                free(full);
+                *commands = yon_char_parsed_append(*commands,commands_size,yon_char_parsed_to_string(new_element,new_size," "));
                 done=1;
             }
         }
-        if (parsed_size){
-            yon_char_parsed_free(parsed,parsed_size);
-        }
         return done;
     }
     return 0;
@@ -1340,8 +1329,6 @@ int yon_config_load_config(YON_CONFIG_TYPE config_type, ...){
             }
             yon_char_parsed_free(parsed,parsed_size);
         }
-        yon_char_parsed_free(command,command_size);
-
 
     }
 
@@ -1631,6 +1618,7 @@ int yon_config_clean(){
 }
 
 void yon_config_register(char *key, char *config_load, void *data){
+    key=yon_char_new(key);
     config_load=yon_char_new(config_load);
     yon_config_parameter *current = NULL;
     if (data){
@@ -1751,7 +1739,7 @@ config_str yon_config_load(char *command, int *str_len){
         }
     }
     if (output) 
-        pclose(output);
+        fclose(output);
     if (i>0){
     *str_len = i;
     return output_strings;
diff --git a/source/libublsettings.h b/source/libublsettings.h
index 00e5e0d..dd0bde1 100644
--- a/source/libublsettings.h
+++ b/source/libublsettings.h
@@ -13,7 +13,6 @@
 #include <pwd.h>
 #include <locale.h>
 #include <time.h>
-#include <math.h>
 
 #define DesktopPath "/usr/share/applications/"
 
@@ -314,21 +313,21 @@ int yon_char_find_last(char *source, char find);
  * 
  * creates new char string by combining two char strings.
  */
-char *yon_char_append(char *source, char *append);
+char *yon_char_append(const char *source, const char *append);
 
 /**[EN]
  * 
  * creates new char string by copying another char.
  */
-char *yon_char_new(char *chr);
+char *yon_char_new(const char *chr);
 
-/**yon_char_unite(char *source, ...)
+/**yon_char_unite(const char *source, ...)
  * [En]
  * 
  * [RU]
  * Объединяет строку [source] со всеми строками, написанными в [...]. Последний элемент должен быть NULL
 */
-char *yon_char_unite(char *source, ...);
+char *yon_char_unite(const char *source, ...);
 
 /**yon_cut(char *source, int size, int startpos)
  * [EN]