You may see
Fatal Error - Revoice Pro 4
Revoice Pro 4 could not be loaded. Please contact the software
publisher for support using this software.
Could not find imported function in specified DLL
if you run Revoice Pro 4.3 on a Windows 7 or Windows 8 system.
Revoice Pro 4.3 requires Windows 10.
If you are running Windows 7 or Windows 8, you can download and install Revoice Pro 4.2 from our Legacy Downloads page at https://www.synchroarts.com/legacy-downloads