Decent Mk2i plus T1 Transmitter software

Hi can anyone confirm current software  for decent Mk2i and T1 Transmitter 

I have 8.40 on Mk2i and 2.60 on T1

I must admit I'm not over impressed dived over 250 dives with watch and Transmitter and has lost comes 70% of time and had 2 batteries 

Running on standard power