I’ve not used SU-Pro 2016 for a while, so had to do the usual PLUSSPEC reactivate. All seems to have loaded ok on re-start, but I get an error message. Please see attachment.
Over & out,
Clayton.
Hi,
To remove this error message you’ll need to manually uninstall then reinstall PlusSpec.
There is a section at the bottom of our FAQ page that explains how to uninstall PlusSpec. Below is the link to the page.
Once it’s been uninstalled, reinstall it to SketchUp and the error will be gone. If you need to download PlusSpec, the link to our download page it below.
Thanks Grant,
I was about to do this, but have a more serious problem with PC. Please see my new post on this issue as need urgent assistance… 
Over & out,
Clayton.