Acrobat Reader DC looses functionality after a couple days of use.

Hello, I'm not sure how else to describe it, but I have downloaded and re-downloaded Acrobat Reader DC several times now for my Mac to get it working again. It works fine for a couple days, and then certain functions seize up.

I'm at that point again, for the dozenth time, where I need to uninstall the program, re-download it, and then install it again. It is the same problem every time. Using the "Add Note to Replace Text" tool, I am no longer able to edit text that I had added at an earlier time.

I can actually create a new "Add Note to Replace Text" area, and add new text. I just can't edit text that I created yesterday or whenever. Nor can I close the note window. Interestingly, I can actually create a new note area while the crashed window is still open.

Thanks for any ideas, TT