Did you try the posted workaround for those Selection-lag victims using SU18 with Win10? It may be a better option given that MS will still be issuing updates.
We’ve seen some issues on Windows 10 where recent updates are causing the Select tool to have some lag. We have a potential fix for SketchUp Pro 2018 (does not apply to 2017). Please download and run this script to apply the fix to SketchUp Pro 2018: WindowsSlowSelectionWorkaround.bat - Google Drive
Please let us know in the form if you have any questions. If you do want to disable the fix, please download and run this script: Dropbox - File Deleted (Please make sure SketchUp is closed when you…