If you're familiar with the environment, here's how to do it. Go into the environment. Go to the mixer layer, then copy and paste one of your instrument channel strips (software instrument, not audio). Now, with the copied instrument channel strip selected, change the channel in the inspector to Inst 256. That should be it.
Hi I know this thread is 7 years old but according to the last comment this solution still worked only 3 years ago (2016). I am experiencing the same issue however I cannot change the channel to Inst 256 in the inspector, as it only shows existing channels (in my case it stops at Inst 33). Furthermore there is an additional, greyed out channel option - Inst 34 - and it says "Reserved" next to it. So in order to change to channel Inst 256, I would have to create 256 channels in order for the option to appear, which is impractical.
As it is 2019 however, it looks as though the system for allocating a Click channel may be different anyway. I checked a different project, and it looks like the greyed out "Reserved" Inst channel is in fact the channel used for the Click. Even if I am correct about this, I still cannot recreate my deleted Click channel, as the "Reserved" channel option is greyed out so I cannot allocate a new channel strip to it!
If anyone can help me I'd be eternally grateful, I would really like my click back!