When using the Arduino IDE, each version of a project is stored in a separate folder with a unique name. The IDE renames the main program to match the folder name, so in order to compare two versions using Folder Comparison it's necessary to make a copy of the new (or old) main program, and rename it to match the old (or new) version. After comparing, the copy created for the comparison must be manually deleted.

It would be easier to use CC Folder Comparison with Arduino projects if we could just select the two main programs, neither of which has a matching filename in the other folder, right click and select 'Compare Files' but this option is disabled in the context menu.

Please consider providing a way to compare files with different names in Folder Comparison.