I found your generator a day ago and already used it a bunch, it is grat for inspiration and generating maps on the fly. I also just checked out the warp tool, really easy to handle but powerful too, nice!
If you'd do a payed version with more than just the "one-click-generate", with all the content you mentioned above, I'd certainly pay a few bucks for that but as you say it's certainly a good idea to leave the basic version here for free, even if it's just to make people notice the payed one ;)
Thanks for your work, stick with it, it's great so far!