Studio freezes when confirming any box

hi- suddenly, in the middle of work, every box I try to confirm makes the software freeze- I can’t continue to any other box and it is possible to exit or close the program, only through the task manager…then, I can reopen it, and problem remains…I tried other documents- the same  I tried starting a new translation- again, the first box does accept the translation memory, and then- crashes…I am really helpless, please help me….
I posted this question on some forum, and now I can’t find it…

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