I purchased a new Windows computer. I download a new copy of Base Camp---Version 4.7.4. I have done this before and somehow my old routes simply appeared in the Library My Collection. That did not happen in this case. So I asked Garmin how to find my actual historical route files. They showed me how to get to my All Data files. Garmin said I should be able to Import these files into Base Camp but when I try that I get an Error Message "Unsupported Version" Garmin had no further suggestions other than for me to re-create my old routes. Anyone have any idea how to recover/utilize these old files?