Testing Server Compatible Bot

Now that the testing servers are back, I'd like to get back to overstacking gold. I used to use Grimoire 3.3, but ever since the testing servers came back I seem to be unable to start the bot. The start/stop toggle simply does not move. I'm not sure if this is an issue on my end, but I seem to be unable to activate the bot.

I'm not sure if I'm remembering this wrong, but I recall that someone had a "fork" of Grimoire that reenabled the testing server option. I looked around and seem to be unable to find it. I only remember it being after 3.3. If anyone could help me out, I'd really appreciate it!

Thanks!

Where can I learn about the things that people do in testing servers?