Most likely regression from https://github.com/eclipse-pde/eclipse.pde/pull/1734 All Eclipse PDE launch configurations have "red" icons as a sign of missing right one. New workspace:  Existing workspace:  Also "Run/Debug" drop-down is affected: 
Most likely regression from #1734
All Eclipse PDE launch configurations have "red" icons as a sign of missing right one.
New workspace:
Existing workspace:
Also "Run/Debug" drop-down is affected: