John,
I had a quick look of the .bas files and I understood (with my little knowledge), it checks the .ver file and compares the version number and then downloads the new apk, after showing message, and installs it.
Please correct me if I guessed wrong.
Yes I will try it after I make the server/file etc. and check it, but just wanted a quick advise from you.
And a
BIG THANK YOU for the this contribution

It is need of the hour now.
Regards,
Anand