You can use either version of the software at any time. You can download both versions at http://www.timedoctor.com/download.html. Both Time Doctor Lite and Time Doctor Pro are considered "full versions." We also have a non-video version of this support article for your review.
This video explains the differences between the two versions:
For questions, comments or feedback regarding this topic, please send an email to firstname.lastname@example.org.