Why do I keep encountering error messages when using VoiceEngine?

"Due to changes in software design, if you have previously downloaded AVerMedia CamEngine, please uninstall it first, then download the new version of the software. This should resolve the issue!
CamEngine download for AVerMedia cameras: https://storage.avermedia.com/web_release_www/software/AVerMedia_CamEngine_Installer_v4.0.58.4.exe
Voice Engine Download for AM310: https://storage.avermedia.com/web_release_www/software/AVerMedia_VoiceEngine_Installer_v1.0.12.1.exe