I'm a bit confused.
First of all there is no version 2.0. The original release was 1.1, then the current release is 1.2. The next release will be 1.3.
All of the new versions will be compatible with the old so you can easily upgrade. I left space in the fiile formats on the original version for new features, only a small portion of which I have used so far. This means the files are compatible.
When I release a new version you should be able to install it and run it with no problems. I recommend you back up your recipe file as a precaution, but in practice the whole thing should be quite transparent.
Cheers!
Brad