The trial version's only limitation is that it does not allow you to save toolpaths, however it does include some specially enabled examples that will allow the toolpaths to be saved for testing
compatibility with your CNC. These are highlighted in the Tutorial Video Browser.
If you subsequently purchase the full version of the software then you will be able to fully use any files created in the trial version as long as the software is installed on the same PC.
Please note that the trial version cannot directly be licensed into a full version, instead the full version will need to be downloaded and installed separately and activation codes entered upon starting it for the first time.