Well, it is Wed, mid afternoon. Continuing from where I left off.........
I loaded "Example 1a.skp" and watched it move. I did the examples suggested in the KFE PDF with ease. I added a few more moves and they worked as well.
Same with example 1b. But it showed me nothing more than I found out playing with 1a. Example 1c looked exactly the same as 1b. I also tried 2a, 2b and 2c, but ran out of "play" time to master what they were demonstrating. I really need to master "waving around" multiple groups, with independent motion, as this is a major area that I will be exploiting.
Here's what I found so far with the Keyframe Editor. Some may be attributed to my ignorance of all it can do, but when I try a new S/W app or plugin I expect a certain intuitiveness and consistency of operation. Then I hit the doc's to find out more. In this case, the KFE PDF offered little clarity, up to the point where I was at exercise 2a/b & c (page 12 is where I am here).
1- From what I've seen so far, the KFE depends on the Transformation Processor for only 1 function, that is "Animation Name" and the TP is "mode sensitive" to the KFE. So if an object is not selected, the TP does NOT display the expected Animation dialog. Took a while to understand this.
In my mind, that function should be part of the KFE dialog, not a separate dialog. And I would suggest the objects' name be taken from the SU group or components name, to avoid confusion later when there are multiple moving objects.
2- When an animation finishes, the object deselects and the KFE dialog reverts back to "Camera" mode. This is VERY confusing, when creating or editing a motion sequence.
The KFE should stay in "Animation" mode and the object should stay selected. When I had 2 groups that coincided at time 0.0 and each had different sequences, it was very difficult to select a specific group to edit, especially re-selecting the group being defined or edited between runs.
3- There seems to be no way to STOP an animation part way through, only pause. You have to wait for it to finish. Not to big a problem when the trial limits you to 10 seconds, but later when the runs are longer that will be a big problem.
You need a "Stop/Quit" button on the toolbar. Preferably it should stop where it is and if time 0.0 is wanted, use the "goto" button
4- There seems to be no easy way to update a time sequence, other than creating a new one with the changes and deleting the old one. For example, changing the time from say, 2.0 to 2.1. Or swapping positions of time 2.0 and 3.0.
If the Keyframe list were dynamic, I would just change the time (or name, or objects position in SU). Add an "update" icon next to the "delete" icon to make the change. Then the "create/add" keyframe dialog would be just that.
5- In playing I royally screwed up a long Keyframe list, so I wanted to start over, rather than take the time to try to fix it. Without saving, I reloaded the same file into the session. The object reverted to the last saved position, as expected, but the keyframe list stayed with the messed up sequences.
The Keyframe list MUST stay current with the last saved SU file version. If not this will lead to problems later when the SU file is edited, or a Bugsplat requires opening the SKB or Autosave files.
6- This one is a SERIOUS bug. I ran a sequence, letting it end normally. I then modified the cube by extruding 2 sides and adding some structure to it, just for the sake of it. I ran the Keyframe sequence and let it end normally. OK so far.
I then hit the UNDO button to revert the object back to a cube. The KFE Watermark said "Rewind" then went back to its' normal view, but at the 8.4 second mark which was the end of the sequence, before the timeout at 10 sec.
The UNDO STACK EMPTIED and there was NO UNDOING any of the edits I made to the cube. 
And, the 8 sec watermark STAYED onscreen during subsequent runs, with the running watermark running normal. The 8 sec watermark is deletable, but the cleared UNDO stack is a major problem.
The SU UNDO Stack must be preserved. You can add SAT operations to the stack if you want (the stack is limited to 100 operations) but clearing the stack is a major no-no.
7- I took a hard look at the KFE dialog box. My main critique is the amount of screen space it occupies. So I made a revised version, taking less space and incorporating my comments #1 and #4.
I've attached a before/after pair.


Note the size reduction, and addition of the Transformation Name, the UPDATE Icon, GOTO 0 Sec button and the warning regarding deleting all Keyframes.
I added the GOTO 0 Sec button because that is a given but I often wanted to return to a defined time repeatedly during a list creation or edit.
Hopefully tomorrow I can start the Tutorial based on what (little) I have learned so far.