on your ‘com’ site mentioned in github page download button does not offer (near by) payed options. Why? Why it is only in the separated Pricing link? Why not to present the same choice in download ?
I personally do not like (in soft words) when button says one thing and delivers something else. So I think renaming Download into ‘Download options’ were you give choice download ‘ free’, ‘donate’, ‘pay for pro’ etc as you like is acceptable and feels good enough. I do not see why in that case it should reduce number of downloads but every prediction is always a prediction and nothing is better then the real life test.