Which program are you asking about?
For most of our programs. the only difference is a 30 day time limit. The trial version for 30 days is fully functional. After 30 days, many of the features are disabled.
Other programs have a 10 second countdown at the beginning and other that than, they are fully functional.
Only one of our programs, A1Click Ultra PC Cleaner, has a restriction in its feature and that is that it only cleans ten items at a time.