Yes.
Yes. Well, easy might be a subjective assessment on my part, but the correct way is to:
1. First,
make a manual backup of the Library with the version of MC you are currently using. Name the backup something recognisable so it is easily selected later, and make a note of where it is saved.
I usually just append something like "Prior to uninstalling earlier versions" or similar to the automatically proposed backup file name.
2. Next,
launch the earlier version that you want to uninstall. There may be some popup questions asking you to
allow the software to make changes to your system. Allow them, as this re-registers the older versions of DLLs and so on. You want these version registered for the uninstall to correctly remove them from Windows.
3. Then
uninstall the version you just ran. There will be a shortcut in Windows named something like "Uninstall Media Center xx".
Note: If you have a mixture of 32bit and 64bit versions, particularly if they are the same MC version, make sure you are running the correct uninstall program, as early 64bit versions didn't name shortcuts differently to 32bit versions. The easiest way to do that is to right-click on the uninstall shortcut in the Windows menu, select "More", then select "Open file location", then right-click and check the Properties of the uninstall shortcut. If it points to a program in "C:\Program Files (x86)\" it is the 32bit. If it points to a program in "C:\Program Files\" it is the 64bit. Hopefully you won't have that complication.
4. Repeat steps 2 and 3 for each older version you want to uninstall.
5. Then launch your current version and allow it to make changes as well.
From there everything should be fine. But if you notice anything amiss, or just want to be sure, reinstall the current version and restore the backup you made in step 1.
If step 3 sounds too complicated, you could just uninstall all versions of MC that you find in the "Control Panel\Programs\Programs and Features", reboot, then reinstall the latest version and restore the backup you made. Uninstalling MC doesn't remove library backups. If you do this, you may need to restore your MC licence as well.
https://wiki.jriver.com/index.php/Restoring_a_License
