Question about LoMap updates: difference between download and update

[druki]

I have 35 LoMaps for Offline use (Version 4.19, Gold Abo). From time to time there are updates for the maps. At some maps, the button is labeled "update", at other maps, the button is labeled "download". What is the difference?
I assume, both buttons will cause the map manager to download the newest map from the Locus server and install it locally to replace the older existing map. But I would like to know why the labeling is different. Has it something to do woth also inclided OffliePOI or navigation data or something else?

[Menion]

Hi druki,

"update" is visible in case, you have already purchased an older version of the map, than the current newwest.

"download" is visible in case, you do not purchase this map yet or you have already the latest version available for download.