I use a Aqualung i550 as a backup to my i770. Due to a driver issue I have not been able to upload my i550 to the Mac version of DiverLog, I have been using MacDiver instead. The software issue has been corrected with a new driver release. I was able to install the i550 to DiverLog but when I try to download the dives it shows they have already been downloaded. is there a way to re-download dives once they've already been downloaded?