works fine in 2.229, but even a fresh install of 2.230 fails to install watcher for me. It shows the error after saving the plugin page, and when you reopen the page the plugin is checked but doesnt appear in plugin list.

Thanks for the report. I'm away but will be back at work tomorrow or the day after and will look into it.

It must be something small because I don't recall making any changes to the watcher plugin recently. My guess is some kind of DLL version conflict or something.

Yes, thanks for the report.

For now, if you want, you can fix the problem by going to the UsbUirt plugin folder [yourVC\plugins\UsbUirt] and deleting the PluginInterface.dll file there.

This should not be confused with the same dll that you may see in the main folder. Do not delete that one.