I have noticed another wrinkle in the installation regime.
The new version of X1 can work with 32-bit Office even if it is 64-bit. In other words, you don't have to have the same bitness in X1 and Office. But if you already had 32-bit X1, it puts itself in C:\Program Files (x86)\X1 Beta, which must be where it found the earlier version. I would expect it to go into C:\Program Files\X1 Beta.
Maybe I don't understand how Windows works.
The new version of X1 can work with 32-bit Office even if it is 64-bit. In other words, you don't have to have the same bitness in X1 and Office. But if you already had 32-bit X1, it puts itself in C:\Program Files (x86)\X1 Beta, which must be where it found the earlier version. I would expect it to go into C:\Program Files\X1 Beta.
Maybe I don't understand how Windows works.