by JoelCFC25 » May 10th, 2016, 4:20 pm
You should never store modules (or extensions) in C:\Program Files\VASSAL--this is where the program itself lives. Your modules and extensions should be placed almost anywhere else on your computer where you have standard write access. Your home directory (C:\Users\<your-login-name-here>) is a good place, your "My Documents" directory, etc.