Thank you all for comments and help
Current settings, searching "Mus" eventully scores 2724, then I click enter and the folder C:\MyFolder\Media\Music is launched in Windows Explorer!!
An intriguing thing is, If I then call FARR again, even without typing anything, I see that "Music" item is ready alredy on the list on top place but only with score 1000!!!!!!!!! And if I then start type "Mus" for a few instants that FARR redraws and that folder gets 645 points that will reach the 2724 seconds after...
My current settings:
Under search folders:
Removing "C:\MyFolder\Media" (score 800) --> will get score 639
Under Heuristic Scoring rules:
Without "Left most Match Bonus (250) --> will get score 2700
Without "History File Bonus (adds weight to previously launched items) (1000) --> will get score 2724 (Same!!)
Without "History File Bonus Max Autoceiling (Grouw to this) (510) --> will get score 2724 (Same!!)
Without "Folder Score as % os file score [<100 ranks files above folder](300) --> will get score 908