Go to Start, Run, type regedit and click OK. Navigate to HKEY_CURRENT_USER\Software\Wasp Technologies\WaspCount\Grid Print Settings. There will be a key named PrinterName, with the data being the name of the deleted printer.
Right click on PrinterName and select Delete. When you next try to print from the View/Adjust screen, it will give you the Page Setup screen and allow you to select the correct printer.