Nope, I got it from the support package.
Somewhen in the past, there probably has been some kind of crash during which the main INI file got corrupted. Overseer has fixed it (otherwise the program would hardly work), but one particular value was fixed incorrectly (because its correct value has changed between Avast v18 and v19) and the result is you don't see the boot-time scan in the UI.
I'll update it in one of the next virus definition updates.