Did you change something in your anti-virus-software? Probably you made an update?I know that many softwares using a gui-interface are giving a warning. When I first installed AChat, I got a warning, too. So I think (and hope) this is the simple problem.
I donwloaded the new version already. How do I start it without the update program? Do I have to go to the root directory of AChat and start the program from there?