@JeffryBooher I pre-pend APP_NAME to the string in the spots that I use this.  That differentiates the mutex between EC and Brackets when they are both running.  Having said that, I can move the pre-pending code directly into the #define to make it more readable.  (I was doing this previously when I was using the static const TCHAR variable, but I should've moved it into the #define when I refactored it the last time for you.)