If you have an issue that KG-Chart crashes when trying to use a Print Preview, please make sure to choose any printer as a default printer.
Even if you don't have a physical printer, you still need to choose a "printer" like "Microsoft Print to PDF".
Please refer to the Microsoft support page.
How to set a default printer in Windows 10
I'll fix KG-Chart soon so that it won't crash if no default printer exists.