Is that issue about the run being stuck there or just needs a lot more time to run the tests? We are aware of a performance degrade issue with this build due to changed local test list execution, which should be fixed with the next build expected early next week. As a simple work-around you can also switch back to the old scheduling setup dependency by editing the Telerik.TestStudio.exe.config located in C:\Program Files (x86)\Telerik\Test Studio\Bin.
In order to proceed, close Test Studio, open the config file in notepad and change the CommandLineRun value to 'False' as shown in the screenshot attached.