- not use start a new thread for every unique problem you have and not use thread of others exept you have something helpful to say
- start a new thread with a salutation. It's a matter of politeness
I don't think your issue is a XAMPP issue, because as far as i know FileZilla Server don't send any upgrade prompt.
This can be a prompt from the FileZilla Client version you use, which is not part of XAMPP.