How to be signed in Retoswap

I like Retoswap a lot. I've been using it for months. Still, each and every time it says I'm not "signed in". The part where it says I should wait for 30 days has been greyed out, yet I've been using it for more than six months. How can I get signed in? And how can Retoswap "know" that I've been using for more than 30 days if it is anonymous and I keep downloading new versions (and removing older ones)? I'm shown as a complete newbie even if I made numerous trades.