Is there a way to switch between different sessions of taboutliner?

I have a huge tab outliner with 68,000 links stored in it. It's becoming quite slow so I'd like to use a new copy of the outliner as my main one. However, I'd also like to use the old one once in a while to work from my old stored links. 

I tried using the latest version of chrome portable, transferred my old taboutliner indexdb folder for tab outliner to it, then installed taboutliner. All of the 68k stored links show, but then it seems to have problems, like when I make changes to the outliner. like if I remove one tab of a stored window, the whole window gets deleted when I close and open google chrome portable again (it sometimes happens, some times doesn't). Sometimes, the changes I made to the taboutliner session doesn't save at all when I close and open google chrome portable again.

Is there another way to access my old tabs? I read that the paid version has back up and restore from google drive, but would it allow me to access my old taboutliner with 68k links in it, while keeping my new fresher one separate?