Update README.md

README.md

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-## GUI APPLICATION FOR CONVERTING APK TO AAB 
+## GUI APPLICATION FOR MODIFYING AAB FILE 
 
 A tool which allow you to modify the AAB file 
 
 Requirement - python 3.6+ , java 8 & .Net core framework 4.5+
+Dont use space and any type of symbol in your name  apk , aab , keystore & OutPut folder name 
+
+**apk to aab**
+Your apk and OutPut folder does not contain any type of symbol and space in name
+Your apk to be working
+Be sure your apk is not corrupted 
+**aab to apk**
+Your aab and OutPut folder and directory  does not contain any type of symbol and space in name 
+
+**sign aab file**
+Your aab ,key store , OutPut folder & directory  does not contain any type of symbol and space in name 
+Your OutPut folder should be emtpy or it does not contain any aab file with name of "YourAAB.aab" 
+Be sure you input Correct password otherwise it won't work
 
 ![image](https://user-images.githubusercontent.com/89777396/140510602-89dc98ee-178a-468d-b524-7807bc55619d.png)