Sorry to hear. Looks like Calc behavior is different on different models (not surprising). On my MBP6,2 (non-metal Nvidia Tesla), I open Calc, toggle display mode to Sci and back to Bas and then I can calculate without the NaN problem. Sometimes I have had to do a simple multiplication and Clear in Sci mode before switching back to Basic. Sorry that didn't work for you.unsuccessful sir. sci mode, math equation plus clear isnt working, but thank you, ill just download another calculator.
I don't want to be in the software maintenance business. Fortunately, the change is simple enough that most can do it.If you really think this extra layer of security is very important for many people, you could fork it and publish your own, modified version on GitHub, just as (I think) Ausdauersportler recommended. That would probably mean a lot for those people. Also then there would be an improved OCLP (for the people who are concerned about that).
Also, if I'm paranoid about software that I download directly from Dortania, can you imagine how paranoid I am about downloading software from other sources? There's another Bernie Madoff or Sam Bankman-Fried lurking out there somewhere.