This Problem was not there till the update 1. But After update 2 & 3 it appears.
The thing is that there is no "botva2.dll", "Dark.png" or "Light.png" & "Setup1.jpg" in the "Uninstall" folder. So when installer uninstalls it can't call the functions of botva2.dll & also can't use the resources like "Dark.png", "Setup1.jpg" and gives run-time error.
So the Solve is, you must add those files such as they copy automatically in "Uninstall" folder at end of installation.
Add these 4 lines in "Files" section of the script:
Source: Resources\botva2.dll; DestDir: {app}\Uninstall; Attribs: hidden system;
Source: Resources\Dark.png; DestDir: {app}\Uninstall; Attribs: hidden system;
Source: Resources\Light.png; DestDir: {app}\Uninstall; Attribs: hidden system;
Source: Graphics\Images\Setup1.jpg; DestDir: {app}\Uninstall; Attribs: hidden system;
You can get help from the update1 script.
