If its the same as mine its not that i went into settings/developer options then unticked usb debugging usb storage comes up you can then tick usb debugging and you can now connect phone to pc.
That did the trick for me. At first there was no reaction on the computer and the phone when i connected the cable... just charging. Unticking USB debugging caused the mass storage to connect immediately.
Congrats to KonstaT for this release, XiiaLive and RadioRecord online streaming services were not working in the previous release, now they do.