Cannot receive files via bluetooth

[Peter Nabbefeld <peter.nabbefeld@xxxxxx>]

Hello,

it seems some bluetooth has overwritten my bluetooth main.conf, as last 
change has been on September, 26th. Also, I cannot receive files any 
more, so I guess, I'd cahnaged sth. there. Unfortunately, I cannot 
remember, what changes I'd made in the past.  :-(

Could You probably tell me, what might cause the non-functioning file 
transfer? Sending files works, btw.

Kind regards
Peter