New OS Install help needed

[Leviathan3251]

I'm kinda struggling to find info on this, so hopefully I'm not duplicating discussions (probably am) but anyways, I currently have Windows 10 and need to move to Pro for my new job. Originally I thought to try the upgrade option using the Microsoft store but that has left me with a number of recurring errors that have facilitated in needing to do a clean install.  I was able to get Microsoft to refund me the upgrade charge and am going the route of a new OS purchase/key altogether.  

 

Now time for a clean install!!! But I've only done this with the same OS key, is there anything I need to plan for with reinstalling programs/moving data from a backup over?  Will anything like the AppData folder have any issues if under a completely different OS product key?  Just wanting to cover all my bases and avoid any further headaches. Thanks for the help!