I tested it right now and works for me. For PTP you need the alternative USB driver http://sourceforge.net/projects/libusb-win32/
Is it possible that the camera itself doesn't correct it accurate? In other words, is it possible that the lens in my SX220 differs from the one they (Canon) used to create a profile?
ptpCamGui always crashes after downloading 7 photos. Moreover, it is pretty slow and does not show a real directory with the photos. Probably, it's more convenient to swap partitions and put the card in a card reader.
Lens profile for the Canon SX220 HS:110710.lcp - 0.02MBUsed Adobe Lens Profile Creator 1.0 (as suggested by Funnel) to create the profile. Shot 45 photos (f8.0, 5mm/7.8mm/20.3mm/35mm). I think it's useless to go further than 35mm (7.0x zoom).
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Started by Themigwah General Help and Assistance on using CHDK stable releases