Is there a reason this happens? I have been using this tool for over a year and at least once a month C2 just blows my project away. Because of this, I backup regularly and it has saved me many times. I just came back from taking a break and my proect is now 168kb in size. It was almost 20,000kb 90 mins ago? The backup 1 and autosave are also gone. I have not backed up today because I have been working sporadically, but I just lost hours of work. I cannot believe I am the only one that experiences this? Is there a known cause for this?