I am not 100% sure it is a forest issue, but 3DS MAX viewport 2024 freezes often, which causes me to have to reboot MAX. Things like menu items work, but the viewport doesn't update. It isn't an IPR thing; it is a viewport thing. I tried rolling back video drivers, but it doesn't matter. It happens when I stop a V-Ray render. It was sometimes, but it is almost everytime since I upgraded Railclone and Forest Pro this week.