Photodex ProShow Producer version 9.0.3797 was the final major release before the developer, Photodex Corporation, permanently closed on January 31, 2020 Official Support:
: Because the company is gone, there is no official way to recover lost keys or receive technical help for installation errors. The Move to Photopia Photodex Proshow Producer 9.0.3797 Registration Key
As a result, the software is no longer officially sold, and obtaining a new, legitimate registration key from the manufacturer is impossible. Software Status & Activation Company Closure : Photodex has been replaced by Photodex ProShow Producer version 9
If you previously owned a legitimate license and lost the key, look for old emails from Photodex or check your backup files. Without an active activation server, even a valid key may not work anymore. Without an active activation server, even a valid
: If the software is still installed on an old working computer, your registration ID may be stored in the Windows Registry at: HKEY_CURRENT_USER\Software\Photodex\ProShow\license\install\25 .
There is no longer a way to purchase legitimate registration keys, activate new installs through official servers, or receive technical support.