If you factory reset PlusSpec this will be fixed. It is because you are a user for over a year. A factory reset will not remove anything that you currently use and it is healthy for your system. Follow steps below on how to do this.
1. Go to 'Extensions' (Up the top between 'Window' and 'Help')
2. Go down to 'PlusSpec'
3. Go to the last option called 'Reset Factory Default'
4. Close SketchUp
5. Open SketchUp and your all good to go.