Thanks, I'll give it a try.
OK, something's not right. One icon is the old app and, in each case, the new icon says it is an "App Store Download", and they are several hundred KB in size rather than the multi-MB of the real app. I just downloaded these last night, and it was well over 3.5 GB total, and the App Store application says they were installed last night also. But it says, above that, that the same three updates are available. A known El Cap bug?