Test build #12 of 25.1 with the Python Version Updater Included

Alright, test build #11 was basically happy, but this build will attempt to do it without the LD_LIBRARY_PATH workaround. If it's happy, then Linux is done. Windows and Mac are already happy, although @jmarrec proposed some changes to Windows. Those may just wait for now unless it's urgent.

Almost there....