Sadly, the newer calcs appear to no longer come with that manual. If I remember, now they distribute a thiner one, which doesn't explain all info. I heard some people bought a brand new factory-sealed 83+ and it missed the huge manual that used to come with it.

In my case, I think the broken archive was caused by MirageOS 1.1. I disabled sorting because it took too long (about 40 minutes to sort 50 programs), but it somehow messed up and did something bad preventing a regular RAM reset from working. It was a 79 KB large BASIC RPG I was working on, which I lost completly.