When I load my exe I get an error because I have inserted an ENCODE macro

ENCODE and CLEAR macros have been removed in the new version 3.0. You should replace them by VM macros (like VM_TIGER_WHITE, VM_FISH_RED, etc)

Anyway, if you want to protect that specific EXE, ignoring the ENCODE macro, please, go to the Advanced Options panel and add the following line:

OPTION_ADVANCED_SKIP_UNSUPPORTED_MACROS=YES