Sorry, but this isn't evidence. Anyone can forge a screenshot like that.

Dev, if you are really still here and want that account back, you need to sign a message using an address you have proved you own at a previous date.

All the info is here in one of the oldest, locked forum posts on bitcointalk: https://bitcointalk.org/index.php?topic=497545.0

Please do this and show us you are still committed to this project.