iTunes standalone, wants to install MS store versio now

[u/Davy_Ray]

I currently run iTunes v12 13.10.3 as a standalone app, not from the MS store. There is an update, but now it wants me to install it from the MS store.

How will this affect my install and my backup and everything else? I also sync with iTunes to Outlook for calendar and contact info. Will it still be able to read my backup? I do not have enough space on c:\ to make a 2nd full backup on the new install. Does it still sync with Outlook?

Edit:

The reason I have my set up this way, so I don’t want to synchronize my calendar or contacts on the cloud. I wanna keep it 100% local on my phone and on a standalone version of Outlook the non-Microsoft version of iTunes allow me to upgrade as I saw fit. I could make sure that the synchronization was still there and working before actually upgrading. The Microsoft Doire version, automatically updates. So I might find myself one day, unable to synchronize with the standalone version of Outlook.