I just noticed some of my softwares and games were installed in the "wrong" folder. Installing them all over again can be a pain. Is that important though?
It doesn't matter at all. Its just a convention, but doesn't change anything when it comes to execution.
Installation location does not affect performance. A 64-bit app will always be 64-bit no matter where it's installed.
- The location where the program is installed only affects how the programs are organized. The program binaries are still the same, and a 64-bit application will always be 64-bit. This holds regardless of where the app is installed, whether it's in either Program Files folder or elsewhere on the system.
Or, at least, it shouldn't be. The separate ones exist so you have a clear visual separation of your 32 and 64 bit apps. At least, from when we used to care bout such things.