Assemblies with "-" in their name can not be found by Simulator
Create a new project (you can use the Calculator test project)
Name project Bug-Report-01
Rebuild solution, launch
Simulator will appear, but complain that it can not find the assembly.
For some reason, while the assembly is named "Bug-Report-01.dlll", whatever is being passed to the Simulator is named "Bug_Report_01". It appears that dashes ("-") are being replaced with underscores ("_"). Changing the assembly name to something without dashes ("_") solves the issue.