You can convert a 32-bit Program Files folder path to be used on a 64-bit system.

Several user environment settings refer to paths in the Program Files folder. If you specify a path starting with C:\Program Files, C:\Program Files (x86), or a localized equivalent, a button appears in front of the path. If you click it, you can convert the start of the path to %ProgramFiles% and resolve that variable to the 32-bit Program Files folder on 64-bit systems.