I want to uninstall the previously installed application and its associated files and folders before installing the new one.
I referred this solution Detect and uninstall old version of application in Inno Setup using its version number stored in registry – this is working fine, but not removing files and folders which was created by previously installed version.
Example: User has the old version in c:\test\my program and now if he changes the location directly into c. Then it should delete the old files and folders which are present in c:\test. Any way to do that?
If you want your installer to delete additional files, use [InstallDelete] section.
Obviously better would be if the uninstaller deleted those. So if it is still feasible to fix your uninstaller, use [UninstallDelete] section. Refer to the installation path using the {app} constant.
[UninstallDelete]
Type: files; Name: "{app}\MyProgram.ini"