I see a grey X next to my Windows files and they can't be opened after disabling computer backup

[__sarah__]

Hello! I used to use the backup feature of Dropbox for my computer. Notably, this included my Documents folder (on Windows 10). At some point I turned off the backup feature because I thought I didn't need it any more. I thought this would stop the integration with my computer gracefully, but it seems that now many of my files in my Documents folder are no longer accessible, as if they were made online-only (but there is no longer an online version backing them). Some screenshots attached. The problem files appear with a grey X on the bottom left of the icon. If I try to open them, I get failure and an error message sometimes depending on the program trying to open it. I do not have OneDrive, which is the usual cause I see online for the grey Xs.

How can I get my files working again?

grey Xs on files that cannot be openedgrey Xs on files that cannot be openedgrey Xs on files that cannot be openedwhat happens if I try to open a text file with an X using notepad++what happens if I try to open a text file with an X using notepad++what happens if I try to open a text file with an X using notepad++

[__sarah__]

Hi @Hannah, yes they are in an actual folder and not a shortcut.

[Hannah]

Thanks for checking, Sarah.

Would you mind checking one more thing? 

Do you see any events related to those files in your events page or your deleted files page?