Legacy EFJ 5100s and AES encryption?

[WaveRunner1]

Hey all,
Some months back I purchased a couple of legacy EFJ 5100s (VHF) from a well-known EFJ seller on ebay. I was only able to give the radios a brief, cursory look-over at the time as I was going out-of-state for some months. I've recently had a chance to examine them more thoroughly. The radios are running FW 1.18.15. Compared to Moto, I know little about EFJ. My question: is it even possible for a 5100 with FW 1.18.15 to be loaded with AES keys? Because they were specifically and explicitly sold to me under that context. I think I already know the answer, but want to double-check with the more EFJ knowledgeable here. Thanks.

[WaveRunner1]

Radio model # 242-5113-310-BA

[n3obl]

I believe you need ver 4 radios to have AES capabilities.

[35-K9-1]

It should say in the PCC software what encryption options are enabled. Under the main menu there should be an option to "Read Radio Configuration" or something to that effect. There should be check boxes next to different options.