Hi Jürgen,
I’m not sure what’s going wrong here – this isn’t something we’ve seen before (besides your previous report).
Could you let us know exactly which version of Windows and Internet Explorer is installed? (IE is used to render the Shaderlight dialogs, even if you use a different browser for web browsing.)
Also, please check the Shaderlight SketchUp exporter log file in case it has logged any errors that might indicate the cause of the problem. The log file is at:
C:\Users\<your username>\AppData\Local\ArtVPS\ShaderLight\sketch_up_exporter_log.txt
Normally it will just contain the time taken to export, so if it contains anything else, it would be worth mentioning here.
One thing to try is disabling all other extensions temporarily, to see if there is some kind of conflict going on. The easiest way to do that would be to create a ‘disabled’ sub-folder within your SketchUp plugins folder (C:\ProgramData\SketchUp\SketchUp 2018\SketchUp\Plugins) and then move everything except the Shaderlight .rb file and folder into the disabled folder. Restart SketchUp to see if the problem still happens. You can then easily move the contents of the disabled folder back into the Plugins folder to restore your other plugins.
Thank you,
Shaderlight support