[Plugin: BuddyPress Activity Stream Extras] Need Help

I made some changes on the source so it is loading language files and i did translate it to german, the fronend is working, in the backend it still has the default language.
I try to find your email address so i can send you my changes and the language file, but i dont find it anywhere, so what should i do with my work?

Greetings Ruben

https://www.ads-software.com/extend/plugins/buddypress-activity-stream-extras/