If you have updated the firmware of the MAXM32664 on the MAXM86161_OSBFLEX_EVKIT then you will find that it is no longer compatible with the MAXM86161EVSYS GUI. To get access to the original GUI compatible firmware (v30.2.3) please contact our technical support team and one of our applications engineers will share it with you
https://maximsupport.microsoftcrmportals.com/en-US/support/create-case/
For a guide on how to update the firmware please see
https://maximsupport.microsoftcrmportals.com/en-us/knowledgebase/article/KA-13834