525 votesAnonymous commented
The workaround given below by Mr. Medri did work for me, mostly. It opens the 2nd instance in MS Internet Explorer. The editing of this 2nd instance was more cumbersome, however, as internet explorer seemed to struggle a bit with it. Also, I could not get to any of the tabs in the 2nd instance. This solution seems ok for at least viewing a 2nd project while you work on another project.