As of version 25.0.0.0, launching CleverGet from the loader no longer launches the full version. It launches as a trial version.
As a last resort, I reset the trial count.
Deleting the following three files and launching CleverGet will reset the trial count.

%APPDATA%\CleverGet\CleverGet\reg
C:\ProgramData\CleverGet\CleverGet\reg
C:\Program Files\CleverGet\CleverGet\reg

When you launch CleverGet, three new files are created. Making these three files read-only seems to prevent the trial count from increasing.

It seems that it won't work if there is a file named «CleverGet Loader.exe» in the installation folder.
It seems to work if you change the file name and run the modified loader to start it.