Error message "Cannot find central directory" when trying to add file to project

Question

I use SDL Trados Studio 2014 Freelance on a Macbook Air via Parallels. 
 I recently copied my files onto iCloud Drive due to lack of space. I got an error message saying I had too many files to do this, but the files were transferred to iCloud Drive anyway, however no copies were left on my Mac. I subsequently installed a larger hard disk and used a Time Machine backup to recover my files. 
 I'm now having constant problems using Studio. The latest one is the above. 
 Any help much appreciated. 
 Andy

Jerzy Czopik · Accepted Answer

In that very situation it really seems your installation in Windows has been screwed up somehow. 
Secure all YOUR production files, which means: 
- projects 
- translation memories 
- term bases 
 
Then you can wipe out the partition and reinstall Windows & Studio. 
But OTOH I always supposed, virtual machines have the purpose of revealing one from the necessity to reinstall, as you can simply take a fresh copy of such machine after first installation and start from there. At lest this is what I expect from my Virtual Box on Windows. I have a clone of my VM just in case the one used would break. Isn't that possible in Apple?

Jerzy Czopik · Answer

When I were you, I would remove all language pairs from the settings, all projects from the projects view and adapt the project templates. Then I would either start new projects or activate old one by double clicking the *.sdlproj file. However, all unnecessary - means ready, finished - projects should not be present in the list anymore. Otherwise the list is too long and gets damaged more often.
To have the program running smoothly, it is also mandatory to copy all term bases and translation memories to exactly the same path as they were before.

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Error message "Cannot find central directory" when trying to add file to project