Am I still allowed to use indigo 1.xx?

[2kemon]

Hi guys
I was wondering if the earlier indigo versions are still free to use?
I'm reviewing my workflow, and I don't want to waste my time setting up indigo materials, if I'm not allowed to use them, since I'm not going to buy indigo.

[Stinkie]

Yes.

[2kemon]

thanks stinkie