Genau dafür gibt es TurboPower OnGuard:
TP OnGuard
Die ersten Zeilen der readme.txt:
OnGuard is a library to create demo versions of your Borland Delphi &
C++Builder applications. Ccreate demo versions that are time-limited,
feature-limited, limited to a certain number of uses, or limited to a
certain # of concurrent network users.
Gruß VolkerW