Hello, These issues are being fixed. If you haven't yet, please update your copies to https://www.gonitro.com/support/downloads While we are still working on fixing these issues in a new release of Nitro Pro there is the following workarounds: 

For the print scaling issue:

Please open the following location in your registry:

HKEY_CURRENT_USER\Software\Nitro\Pro\11.0\Settings\Preferences\PrintSettings > kPagePrinterScaleSelector 

>> Set the regkey to '1' 

>> NOTE: You are required to use the Ctrl + P shortcut rather than File > Print to utilise this.

For the print window issue: Please either press Esc, or the back button to exit.

I hope that helps!