[pedram]

Solution No.1
You may choose to install using the downloadable .exe version. The main benefit is that there are no UWP restrictions and you have control over the update of Kodi. You may choose to uninstall the Store Version.

1. Go to the Download page
   
2. Select either INSTALLER (64BIT) OR INSTALLER (32BIT)
   
3. Run the installer
   
4. After Kodi has been installed, do not start it.
   
5. Go to C:\Users\<yourusername>\AppData\Local\Packages\XBMCFoundation.Kodi_4n2hpmxwrvr6p\LocalCache\Roaming\ and copy the \Kodi\ folder
   
6. Go to C:\Users\<yourusername>\AppData\Roaming\ and paste the \Kodi\ folder
   
7. Start Kodi
   

Following these steps I uninstalled the UWP Leia 18 (store version) after upgrading from 17.6, and installed Kodi 64 bit EXE version. Got to step 5 and there was no XMBCFoundation folder under C:\Users\<yourusername>\AppData\Local\Packages. Am I out of luck?
It's not a huge deal to have to add my library folders again since I didn't have much customization apart from having to mark everything already "watched" one by one, but I'd rather avoid it if I can.
Thanks.