Removing icon from menu-bar
So I downloaded dyno marker software on my Mac for you and I found a simple solution to your problem but before I tell you the solution, make sure of the following:


DYMO label marker app should be quit
Make sure the app is in your Applications folder


After making sure then run the following in terminal app:

rm /Applications/DYMO\ Label.app/Contents/Resources/DYMO\ Label.icns

Then open the app and check if you are still able to see the icon in the menubar.