If you see a blank licence activation screen (as per image below) upon accessing or installing our PlusSpec software, would you please check the following;
1) Right click inside dialog: (as per image below)
a) Open Internet Explorer, select Tools > Internet options.
b) Select the Advanced tab.
c) Tick all SSL options as per image
In SketchUp, go to Extension Manager (Usually found under Window in SketchUp) disable all plugins except for PlusSpec & primary SketchUp plugins (Advanced Camera Tools, Trimble Connect, Sandbox Tools & Dynamic Components). Apply changes. Close open SketchUp.