Please UPDATE to TSK Controller v.89 and ReLax Controller v.57 (20140127) with simplified On, Off and Shutdown button controls:
1. Long press (>3 sec.) "+" button to turn ON,
2. Long press (>3 sec.) "-" button to turn OFF, and
3. Very long press (>6 sec.) "-" button to SHUTDOWN Controller. (Wake-Up upon USB charging.)
The new Controller firmware should provide better battery protection and eliminate the accidental Controller firmware corruption problem (during low-battery power down sequence) encountered by some users. We apologize for any inconvenience these may have affected you.