Great now that you managed to get some decent looking features into the v2 beta, especially encryption for me 

 thanks!  
I tried to create a new archive on an Airport disk today and received the following error in the log, after Recall crash.  
Action 2015-07-11 12:43:04 ------- Create (Unknown) 
Action 2015-07-11 12:43:04 archive: (null) 
Action 2015-07-11 12:43:04 Failure Program exception 
Action 2015-07-11 12:43:04 Failure Command failed 
Action 2015-07-11 12:43:04 ------- Create incomplete (00:00) 
QRecall 2015-07-11 12:43:04 Failure Create command failed 
QRecall 2015-07-11 12:43:04 -[DDPath initWithPath:]: absolutePath is nil 
QRecall 2015-07-11 12:43:04 Failure -[DDPath initWithPath:]: absolutePath is nil  
Edit: It seems this is the error when creating an archive on a local disk too 
  Hopefully you are planning on supporting El Capitan in this v2 release, or not? (as you mention not much testing being done on El Capitan, but not whether you want it doing 

 unless I missed it)  
Regards