This is Merlin’s Asuswrt 378.53 for the ASUS RT-AC68U/R.
-sync latest changes from RMerlin.
Download (ASUS RT-AC68U/R):
-Flash the .trx through the UI
-After it is completed and you are returned back to the UI, wait a short while (~30 seconds) then power cycle the router (with the on/off button).