Is it possible to simultaneously open two different experiments in LabAuthor to edit or combine them?

No. LabAuthor does not allow users to open and edit more than one experiment at the same time. However, content from multiple experiments can be combined in LabAuthor. This is achieved by opening one of the experiments and importing content from the other experiment/s. 

For more information on importing experiment content, please see the LabAuthor Help.

This information is valid for LabTutor v4.0 or later.