Finally, we've got the support from TradeSatoshi!
From their official tweet:
YTN version 2.0.1 has been rebranded as YTN_OLD and old balances will be swapped into the new YTN version 3.1.0 at a ratio 300:1
YTN version 3.1.0 will be listed very soon
https://twitter.com/TradeSatoshi/status/1104247518911594496