We are working on a version of Tawe that will allow you to click through using the keyboard as well as the mouse to overcome the inadvertent recording of mouse clicks. There is no solution to this issue at the moment.
This request seems very useful and I have the same problem, I would like to use the keyboard to control the slides, have not yet forecast for this functionality?
Oops, I noticed now that the first question is already a year old! ¯\_(ツ)_/¯
So how do you record a voiceover without also recording the sound of your mouse clicking when you advance to the next slide? I plugged in a Powerpoint presentation tool to use but Tawe won't let me use it to advance to the next slide.