Hi Maurizio,
The MCU V10.6 is not required a new license file.
The MCU V10.6 can be used with MCU V10.5 license file.
What is the problem with MQX V4.1 ?
Attached you will find Release_Notes.pdf manual.
Please have a look to :
Appendix B: Freescale MQX™ RTOS Integration
Regards
Pascal