Problem downloading V28

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New member here, with a new (used) X5 in the garage with MKIV NAV. I have a lot of Garmin experience but am new to the BWM GPS.

My attempts to download V28, following the instructions here worked fine, but after "unzipping" the .rar file, I didn't get the expected disc image (.ccd?).

I sure there is something simple I am doing, but I sure don't see it.

I have been routinely loading redlight POIs to my Garmins, so am happy to see that this appears possible (though not as easy as I am used to) with the BMW.

Whose GPS and OS is this?

Thanks in advance for any help.

[Any other GA pilots in the group?]

D Hudson