Bug found 1.6.2 won't open or save files

Receiving an error message “this application cannot be found” upon opening files. When we saved the files it would say “files are too complex, try reducing preview window” (from illustrator). Only jpg would allow us to save no other file extension. No files (not even jpg) would open in finder until we restarted it. After restarting it would work for a little bit but then we opened an eps in illustrator and it would result in the same type of issues. Using the same file with total finder closed everything worked fine. Would it be a good idea to download a prior version? The computer is on Mac OS 10.9.5

Is this reproducible on multiple computers? I’m afraid this will be very hard for me to reproduce here, because I don’t have Adobe software.