Mission Planner v1.3.74 where are pre-fetched maps stored?

I performed a Pre-Fetch to down load a flight test area. When I look at C:\Program Data\Mission Planner\SRTM folder I see 2 zip files (Nov 2020) that were created late last year, but I do not see the Pre-fetch file I supposedly saved today 19jan2021.

When a pre-fetch is performed does it simply update the zip file(s)?? If not, then what am I missing here? Are pre-fetch stored some other location??

it is in the C:\ProgramData\Mission Planner\gmapcache folder