Stefan,
A quick and dirty way to accomplish this: if you have not committed your changes to the server (using Commit on the Changes tab in Studio Pro), you can
Studio Pro will then download the version that was last committed to tearm server.
Hope that helps,
Mike
Many thanks to both of you.
Unfortunately, I was just in the middle of rebuilding and hadn't committed any change since.
It looks like there is really no way to roll back, as there seems to be no way for other activities as well. Version control is the way to deal with it, I learned a lesson again.