Frodo, thank you for all the time you've put into this! I really enjoy the interface and other features you've added over the traditional PFM.
I'm having trouble adding negative values in the tool though. I can copy/paste negative values written outside of the tool, but there seems to be no way to enter values below zero just using the tool itself. It's not clear to me if it's user error, or perhaps a bug. I appreciate your time.