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the topo canada map i thought i down loaded....
keeps telling me it is "invalided" ...
it is a "compressed zip file"...
for the life of me my 64 bit windows 7 computer will not allow to open the zip file  to transfer to my gps...
any ideas???

being a newbie here....
i down loaded a file for "Canada Topo Map"...
it came as a "Zip File"
my question ...
what program would i use to open a "zip file"?