That's correct, the original version on FAB was DMCA'd and taken down, but we're not really allowed to say much more than that.
This current version has been almost entirely remade (with plenty more features/updates added since the original as well.) While it's impossible to say if anything is "safe" or not, we do believe it's more in the hands of the developers and how they choose to use these assets when it comes to not infringing on existing IPs.
As for why we switched platforms, we ran into issues with FAB before so we switched to itch.io for unrelated reasons to the DMCA. I believe FAB might be better nowadays but honestly we're quite happy with itch!
For more info and some comparisons between the different versions, I'd suggest to take a look in our Discord! https://discord.gg/JYUZWf7ux