As another long time EvoCam user, I switched to SecuritySpy several years ago. (bensoftware.com) But it is neither cheap nor simple, so likely way more than you want or need.
Like Xair, I have several Sharx cameras. I have mine set to send an image to a folder on my Mac every minute, and WeatherCat picks it up there and adds the weather overlay. But I doubt the Logical software does that, or you wouldn't be asking.
Hopefully, Edouard's link will help solve your needs.
Good luck!
[EDIT] Thanks Blick!