I suspect this has been requested before, but not an easy concept to do a keyword search for. I would love the addition of a non-realtime update mode that would prevent your TyFlow system from being refreshed until you change the current frame in the Max timeline. This would allow much easier editing of your operators settings, source geo, forces, etc. on complex and slow setups without the need to constantly keep disabling and re-enabling it (or relying on the manual refresh option each time). I think the best implementation would be another option under the Refresh Modes that behaves this way. It's one of the only things I still miss about Thinking Particles