Question: I upgraded my version of Windows and now PentaCalc doesn’t run anymore. I can see the minimized icon but when I click on it nothing happens. Answer: 1. Close PentaCalcPro by right-clicking the icon and select Close. 2. Delete the file: c:\windows\pcalcpro.ini. 3. Download the file pcp.exe from here. 4. Replace the pcp.exe file in your PentaCalc Pro install folder with the one you download. 5. Run PentaCalcPro again as normal and it should fix the problem. Please feel free to e-mail us with any other support questions you might have.