I create a macro for pressing SHIFT and W (run) and assign it to a button using the playback option "Toggle continuous playback on/off using assigned key". It doesn't toggle off on pressing the key a second time.



The Razer UI is more pretty than Trust software that I've also used to do this but it doesn't help much if the feature doesn't work. So far I made it work by assigning pressing up SHIFT+W to a second key. This is inconvenient, also I didn't have to do it on my Trust mouse. It was half the price of the deathadder v2 I have now.