is not absolutely necessary to download the vector maps from here. If your PC has an internet connection, the
easier solution is: Start StrePla3 and
point to Extras.Map Manager. Choose
Internet as a source there. The whole download and installation will
then happen automatically without your needing to do anything else.
Naturally you can still download the maps from here
and then install by double-clicking on the downloaded file. You will
find an instruction for the download