Why is it all my imported screens from mockup gallery now have wavy lines instead of straight ones on all the borders? It looks like a kid drew it. Is there a setting to turn it off?

Nevermind found it, its under Window > Preferences > WireFrameSketcher >Theme and then select "Clean"

John,

You have probably reinstalled WireframeSketcher from scratch. Sketchy theme is the default now. Use the preference you've found to change it back to old theme. You can also change the theme per-screen using Properties View.