your license is not installed properly. make sure to install license properly, and preferable configure online validation
, so ZM can download and validate license automatically (viewtopic.php?f=21&t=5711
ZModeler should be run as Administrator
, so it can save license. ZModeler requires to save license and start with license saved on your hard drive in order to be able open/save/import/export. Thus, ZModeler folder should be accessible: do not put ZModeler onto your Desktop, as Windows Defender might block ZModeler from saving license. Prefer a folder like C:\Program Files (x86)\ZModeler3.