Beta Tester invite expired

I was invited to be a beta tester for the Android Acrobat Reader app, however I got the invite on 2/8/17, a few days before my wedding so I wasnt able to check it for about a week and a half.   When I did, it said the link,  bit.ly/acrobatbeta was expired.  I can't find any other way of signing up for it and I'd like to be a part of the beta program.  Please send me an updated link. 

Thank you very much!

Sincerely,

David Oberlander