MD5 Hash
Since this a file transfer program with encryption capabilties, I would REALLY like to see an automated MD5 hash take place on the transferred file after transfer has been completed -- and have the MD5 result show somewhere on the screen. Or at least have this as an option for those who may not need to use it. https://www.fourmilab.ch/md5/ has a freeware/public-domain program that you might be able to incorporate easily into your product.