I am running EC v5 beta 3 but I have v4 to try tomorrow.....Thanks for the suggestions to all.
I am also running EvoCam 3.7.6, and have a .DMG I can send if needed. I bought version 4 before it was released, so got to use 3.7.5 while waiting. I tried v4, and immediately went back to v3.7.5 because a lot of things I was using were removed. I never tried later versions of 4. I have a .DMG of v4.0.4 and v5.0, but I don't think my v4 license works with v4 (I haven't tried.)
Version 3.7.6 still works fine with Mac OS Sierra. I have four Sharx 3905 cameras running over wifi, and a Logitech 9000 USB running 24/7 on my 5 year old iMac. There has been a problem with it quitting twice a day for a number of years. I created a quick AppleScript to check to see if it is running every ten seconds, and if not, launch it again. Other than that, it has ben great.
With you needing to quit yours every so often, you can do something similar. Create an AppleScript to have it quit and relaunch just after midnight each day, or something similar.
Steve