Bc2000 (for the BCF2000 & BCR2000)

Hello everybody. Haven't used my bcr2000 for at least a year. 
Today dusted it off plugged in and was unpleasantly surprised with inability of bc control to transfer data back to the unit. After a brief search on the www i found this group and Bc Manager. Fantastic so far.
Changed one of the presets and sent it back to the unit via midi send - worked as a charm. Back to Ableton.
In need for some more adjustments i quit Ableton started Bc Manager and accidently clicked in Bc Manager something that i don't even remember, at the same moment all the LEDs on the unit went off. I thought it might be a good idea to restart the Bc Manager and the unit. After doing so the unit stoped transmitting any MIDI data(panic didn't help), all the presets were gone and when i start the Bc Manager i get following notification: "Error:Cannot start MIDI input device BCR2000[01]. Handle being used simultaneously on another thread(eg callback]".
First question: What did i do wrong so that i can prevent future accidents of similar nature?
Second question: How do i recover from this small disaster?
Any help and/or advise would be greatly appreciated.
All the best.
Vladi.