Ok. Let's try and investigate this. Suppose that rsyncrypto is asked to
decrypt a folder, and one of the files there does not have the relevant
extension. What should rsyncrypto do?

If rsyncrypto finds a file without the specified extension in a directory it could simply list the file on the screen or in a file according to the specified verbosity.

Is there one? A Decrypt gui?

Not yet but I'm working on the GUI. It should be finished this week-end (or around monday).
 
> And once again Congratulations !!!
Thanks. What for? So far, the 1.x versions have been the least stable
releases.....

Congratulation for the idea, for making the program and for making a Windows version (I use Linux on all my servers but all the end users use Windows).

David V.