How to remove Photos Microsoft

Hello,

I migrated to Windows 10 and I have Photos Microsoft as my application to open  my files.

The issue is that it stopped working. Every time I open it, the application shut down immediatly.

I would like to know if there is a possibility to reinstall it.

I tried:

- To remove it from the Windows Store, but it seems that I can't, it just tell me that I have it on my computer.

- To go on my account and see the last downloaded applications but I can't find it.

- To remove it from the application panel from Windows 10, but the button is in grey, so I can't remove it.

I know it's not a big deal,  but it bugs me out to see that something doesnt work.

I don't want to use a restore point or anything like that.

*Issue n°2*

I also would like to know how to enable the "sending error reports to microsoft"

When I check it in the configuration panel, it's greyed and I can't enable it or even acces it from the advanced settings.

Thank you for your help.