Crashing - I need to erase TLB and start over

However, I tried to move one very large (more than 1GB) folder into TLB and the system went crazy.

What do you mean by that? Did you actually move a folder onto the toolbar, or did you create a virtual menu to it? What was in that folder, filetype, amount of files...?

As a test I just created a virtual menu to a folder with 24 videofiles (total size 25Gb) and it works without a glitch, just takes some time when opening it, but that's probably because it's an old laptop.

Please describe the steps to reproduce the problem in more detail.