Yeah, I now see both DX and DX Pro too (and it sets the standard version as installed when updating DX Pro).
I wish there was an hidden registry setting to override the system version check (there is another way, but it's way too complicated).
You could try uninstalling, then hidding the standard version (right-click / More -> Hide application) and then try installing again. But if the system check is still there you won't have any DX version installed anymore until the problem is resolved...