I've attached a new version of tswriter that provides some additional logging on startup. Would you mind using it in your Sky 1.3.0 Alpha install? If it ever happens again it should help us narrow it down a bit.
Not sure about instructions.. but its so simple you dont need any.
If you have done the usual channel scan and you can tune ok (proves TVServer works ok), then simply tick the UK Sky Grabber option (which you have). Then to force a EPG grab (to see if its working, go into "Manual Control" and click on "refresh EPG".
Wait for this to finish and you should have Sky EPG data
As Jay says, all you should need to do is scan 28.8e for the Sky/Freesat channels and the EPG should populate with the option "Grab Sky UK EPG" ticked.