If by "Enigma 5x upd" you mean updating the firmware of a Dreambox or clone:
Enigma uses structured exception handling (SEH) to confuse tracers. Run the target under x64dbg and set int3 on the very first instruction. When the exception occurs, pass it to the program. unpack enigma 5x upd
Now set a breakpoint on ZwContinue (or NtContinue in ntdll). This function is used to return from an exception. When you hit it, step out (Step Out / F8) until you land in a region that is not ntdll, but is outside the main protection stub. This is often near the OEP. If by "Enigma 5x upd" you mean updating
If you are working with Enigma2 (E2) set-top boxes, you generally encounter the term "UPD" in three contexts. Enigma uses structured exception handling (SEH) to confuse