Sure. I didn't know what winlaunch is. I thought it was used to start Amiga programs from Windows (like RunInUAE). The opposite of course is dependent on the type of the exe, not on its name. If it does not work with 64bit, then it won't help to rename it.
Did you allow to run x86 code in the Misc section of WinUAE? It's considered a security leak because you can run malware without control of your antivirus software.
