Alexandr,
We're not going to upgrade JomSocial Migrator. The last time we touched that extension was more than 4 years ago and it worked for CB 1.2 and JomSocial 2.0, I believe. If you want that version, you can have it, but my guess is that it won't work at all.
We no longer provide it, promote it or develop it. I also believe that JomSocial has their own migration tool, but could be wrong.
Thanks,
Alex