Bizagi is extremely slow and actually it's almost impossible to use the modeler
Since 2013 we have been using the free Bizagi Modeler. Actually I was the one introducing it here to my Company and now a lot of my colleagues also use the Modeler. When you switched to the new GUI some years ago it became slower and more unresponsive, but with the latest few updates it's now actually almost impossible to work with. I have one diagram open with all in all 8 tasks, a swimlane and a couple of gateways. My machine has an i5-6200U CUP @ 2.30GHz with 8GB memory. Other colleagues has the exact same issue. I have tried to reinstall without any changes. I get a not responding just when moving a task. I know we are just using the free modeler, so I doesn't expect support, but I think you have a serious issue. On example is we have actually considered to roll out Bizagi as our Enterprise BPM tool, but due to the performance issues we have put this on hold.
IT Project Manager