To reset the preferences in order to test with a clean environment:
Windows: %LocalAppData%\SketchUp\SketchUp 2022\SketchUp\PrivatePreferences.json
Remove:
"This Computer Only"/WebCommonDialog_TT_ExtensionSourcesDialog
"This Computer Only"/WebCommonDialog_TT_ExtensionSourcesScannerDialog
d = TT::Plugins::ExtensionSources.app.open_extension_sources_dialog
wd = d.instance_variable_get(:@dialog)
wd.set_size(870, 500) # EW screenshot size
d = ObjectSpace.each_object(TT::Plugins::ExtensionSources::ExtensionSourcesScannerDialog).first
wd = d.instance_variable_get(:@dialog)
wd.set_size(870, 500) # EW screenshot size