Solved Missing App tiles / Can't find app using search

Hi,

I was working on desktop mode and suddenly my screen went black. After about 4 seconds everything returned to normal but when I went to the Start screen all of my application tiles were missing. Except for Desktop & Store tiles, all the others had disappeared. I tried to search the missing apps and pin it to Start but it cannot be found. They wont even show in All apps.
I don't think the apps are deleted because from desktop I can open image/audio files with Photos and Music app.

Not sure if the problem maybe a result of me accidently changing the AppData folder to visible a couple of minutes earlier.

Please, I would like some advice to solve this issue.

Thanks

If anyone else is having a similar issue try the following.
Change the properties of the folder "AppData" to be not hidden. Including the files inside it. Worked for me.