UWP file not deleting after uninstalled

I opted-in to Minecraft betas via Xbox Insider Hub, then I reinstalled y game to update to 1.12.
Earlier today, I wanted to go back to 1.11.3 so I uninstalled my Minecraft, opted-out of the betas and restarted my pc. When I installed the game, it put my in 1.12 beta, and I got really confused. I then started looking around in my game files and noticed the UWP file for Minecraft 1.12 was not deleted. (As seen in the picture below)

I thought this was a random bug, so I tried to manually delete the folder, and it wouldn't let me and didn't say a reason.