Windows 10: Opera missing from All Apps list, but does reside on my machine

This morning, I found that my Opera browser had disappeared from my Start Menu. When I went to "All Apps" to right-click it back, I found That it didn't appear in the "All Apps" list. I have a couple onksto Opera (including one pinned to my taskbar) and the work, s I know it's out there somewhere. I tried deleting my "Tiledatalayer" folder and rebooting, but nothing changed. It's almost as if my machine (a Lenovo g700 laptop running Windows 10 [upgraded from 8.0]) doesn't know I have Opera on my system. To my knowledge, Opera is the only app of mine that's behaingthis way. What's wrong and how do I fix it?

:)

 

Missing All Apps List


Start menu no longer has All apps menu option because it is not needed. The list already contains all apps, simply scroll up and down to see all apps:





You can also click any letter to open a list, select a letter from this list to jump faster to apps starting with chosen letter:

 

Programs Missing From Control Panel List

I was able to get rid of XNVIEW by downloading it and using it's own uninstaller.
Have tried method suggested by Pyramid 10 with photoscape without success.
Can't figure out how to do what is asked.

Your next suggestion?

 

Why did the startup window get cleared?

I didn't missed any step, the list was gone and gone , even after using lot of programs the programs were not listed in that list.