just finished a print with my UM1 using Cura 14.06 Noproblemo.
Then got a message update 14.07 is there, so I upgraded.
After installation I checkmarked the extruder upgrade (as always) an also checkmarked the homebuilt heated bed (becuase i´m working on adding one, which is 80% finished).
Now Cura does not want serial communication with my UM1.
Went back to 14.06, but the old version also could not get connection.
I wanted to downgrade to see if an older version of the firmware would still work, but since no version of cure seems to be able to communicate with my UM1 anymore I dont know how to fix this.