This is really a Tuelz problem, not a ZZ question, and this is the ZZ thread.

I believe the problem is you have projects that have "broken" with changing computers.

For example, file paths to ZZ prodect folders are likely not the same. This causes Tuelz to fail.

Try moving tuelz.dat into another folder, or delete it (but save it somewhere) and see if that fixes the problem. Unfortunately, I don't have a fix that will import old projects, and not sure there really is one.

Again, backup the tuelz.dat file and delete it from the tuelz folder and let me know if the Tuelz work after that.