Hi … I may be a noob but I’ve been having the same problem now for the last week or so (at least 6 times trying to get it).
Every time I request a map it is being generated and I do get an email saying that all the different files have been generated - including the _windows.exe installer for Basecamp.
I am sorry to say I do not see the _windows.exe file on the downloadsite where the link is directing me to.
I do see:
3 osm_generic files (linux, mac and the gmapsub.zip)
2 license.txt files (one with some numbers)
1 buildlog file
and 1 nsi. file