Updating include directories after updating Vivado

So, after updating Vivado, I ended up with a number of warnings during compile in the SDK IDE, referring to an old, now missing path. As the paths didn't appear to be modifiable within the project settings, I searched for a way to update them.

That brought me to this post, which has approximately the right stuff:

1. Close the SDK.
2. Delete the .metadata folder in your xyz.sdk folder.
3. Restart the SDK.
4. Import the existing projects. You'll see that only the design folder was automatically imported.