Since ProShow Producer is no longer supported or legally sold, users are encouraged to transition to modern platforms:
The following article addresses the common registration issues for , specifically focusing on the "Illegal Use" or "Evaluation Mode" errors caused by the official server shutdown. Fixing Registration Key Issues in ProShow Producer 9.0.3797 proshow producer 903797 registration key fix
Enter your key again; this often forces the program to re-verify against the legacy server if it is active. Since ProShow Producer is no longer supported or
If the evaluation banner remains, ProShow Producer completely. Restart your computer and reinstall the software. Restart your computer and reinstall the software
ProShow stores registration data in a specific file. If this file becomes corrupted or "read-only," the registration won't stick. Close ProShow Producer completely.
: Many sites claiming to offer "registration key fixes" or "cracks" for version 9.0.3797 are often sources of malware. Long-Term Solutions and Alternatives