Yes, it's probably correct. Lightroom 6 and CC both use zip files to compress the data.
I have upgrated too ( 4.4 -> 6) since a few time and i saw first that LR6 save my catalog with an other name and in a second time the backup file was zcompressed ( ZIP file ).
and a bad link for help ( F1).
That's all for me
There is a 6.0.1 update (already) that will fix the help link and a few other things.
No , i already said on the forum that the upgrade 6.01 didn't fix the problem of link help
Thanks for that, I think that answers my question.
I guess that's what I get for assuming. I have Lightroom CC, and the update fixed the help link for me. And the notice that the Lightroom Queen posted on her website indicated that the help link had been fixed in Lightroom 6.0.1.