Simon 5 is coming soon!
Simon version 5 is currently in beta testing. 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 will be a paid upgrade from Simon 4 after the beta. Purchasers since September 1, 2020 automatically get a version 5 license (that also works in previous versions).
Re: AFP Mounts crashing FileMaker
Thanks for letting me know of this. It does sound rather weird.
FileMaker Trial & AFP server for reproducing
If you have the time/urge to see if you can reproduce this bug, a FileMaker Pro v9 trial can be had at http://www.filemaker.com and I'd be happy to provide you with an AFP login to give it a try on the same servers that I'm using here.
Thanks,
John