Why the demo it's 4.0.1 and the paid version is 1.0.7? The "r" in 4.0.1 means anything, and the "b" in 1.0.7 too? It's look like the demo version it's more updated than the paid.
Viewing post in Trix and the Horny Tower - GAME UPDATED v1.0.7b comments
The demo and the final versions had different numbers because they received different updates. Also, the letters mean different things and change according to the platforms (e.g A is a Steam version of the game since Steam has achievements). The paid version is always more updated than the demo. They are mainly for internal control, you don't need to worry about that.