Vlk
10
What happens when I reboot the machine? Will Avast replace the file, and then I have to reinstall again?
Yes.
Will I get this reboot screen every time I want to update?
Yes.
Sorry, but this is how it works. It doesn’t like patched files 
But this is just a temporary thing, just to test it helped.
If you’ve got some time (and still have the original setup exe file), it may be worth trying to reinstall the program, replacing the ashServ.exe file upon installation, and leting it to do the VPS update as you connect to the Internet (the original setup exe doesn’t contain the latest VPS file, of course).
Thanks for your help,
Vlk