Actually, totally give it away for free. Saturate the market with it. Liken it to the freemium model on mobile devices. Seriously.. hear me out...
1. Give it away. You already have a finished product. Polish it up and get it into everyone's hands.
2. Make it easy to buy bells and whistles from within the program. New FX, extra features, etc. It doesn't even have to be expensive. I'd rather sell 100,000 $5 items, than 10 $200 items.
3. Cross promote. Make it easy for third party developers to tie into SE2. You can even license the ability to them.
Make your editor so prevalent that every production company is using it, because every communications student is learning on SE2.
I've been editing for 25 years. This is the best UI I've ever worked with. There are a lot of other people on here who feel the same way.