Label maker doesn't work in writer

I’ve just upgraded to Windows 10 and Libre Office 5.1. I have been trying to load a Address database in to Writer label maker. The problem is when I click the drop down options in almost any box the selected option goes away also when I use the label maker stand alone I can’t set the right paper size. I’ve used this feature before but don’t when it disappeared with installation of Windows 10 or which version of Libre Office. The same problem occurs on another computer I have with same configuration. Anybody have this problem?

BDE