Introducing Simon 5!
Simon version 5 is now available. It is a massive update, introducing a much-requested feature: syncing the Simon data between multiple Macs, plus a Simon Status service, a Link Checker filter, improved Find filter, iMessage and Speak Error notifiers, a new app icon, and much more.
Important: please note that Simon 5 requires a minimum of macOS 10.12 (Sierra), and is a paid upgrade from Simon 4. Purchasers since September 1, 2020 automatically get a version 5 license (that also works in previous versions).
Re: Vary monitoring times
At present that would require two tests. You could have one test to check every 5 minutes, and auto-pause outside business hours, and other to check every 15 minutes, and auto-pause during business hours.
In a future version (perhaps 3.2 or so) I want to change the scheduling options to enable such options. I plan to merge the frequency options and the Auto Pause features into the ability to add multiple frequencies, each with their own active day/time range.