I've received the OTA_T6_UL_K44_SENSE55_MR_HTC_Europe_2.61.401.3-1.54.401.1_release update, and integrated it with my ROM, and I backed it up via TWRP recovery (System/Boot)
if you want to try it , your MAX must be GSM ,it is fully functional, and stock /unrooted and without any modifications.
And it requires few simple step to install it :
1- download the file ( https://www.dropbox.com/s/r1yctvgu68...lease-keys.zip
2- Extract it
3- Put it in TWRP backup folder on your SDcard ( TWRP/BACKUP/FA3NK..../
4- Full wipe/ format system/ clear cache /
Edit : here is the new link :