There are two options to use FEBuilder on Linux.
The first one is to use wine, though it isn’t very reliable with FEBuilder. Sometimes doesn’t work, sometimes it works just fine. I’m not sure about the more advanced tools like the debugger working with wine though.
The second, more reliable option is to use a Windows Virtual Machine. This can easily be done with Oracle VM VirtualBox.
Any Windows version from XP to 10 should work (Windows 11 has been largely untested, but I’ve heard that FEBuilder works on it. Whether or not Vista works is unknown).
FEBuilder is a 32 bit program, so you don’t need to use a 64 bit Operating System that would take up more resources.