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#11
Hi Fergus Pearson.
What Apple wants to upgrade to (12.2.2) should not be Important. The only important thing is that the version of the msi you have in the referenced install folder is the same as your current iTunes version (12.2.1.16) and that the uninstaller can find it. It sounds like the only thing you need to do it to tell the uninstaller where to find the msi. Hopefully you can do this and the uninstaller can remove the old version and install the new one.
If that doesn't work then I have seen posts on the net about needing to edit the registry to point the uninstaller to the correct location.
If you have never used regedit (windows registry) it needs to be used with great caution and only after making a backup of your registry in case you make a mistake. Let me know what happens when you tell the uninstaller where to fine the 12.2.1.16 msi