This is a bug I found: every time I double-click a project.scrivx file Scrivener starts with a message box that says that this is not a valid Scrivener project. If I use the “Open…” dialogue it works. This happens almost every single time I try to open a project directly from explorer.
Also, as a sidenote, under Windows 7 it would be really cool if Scrivener would “remember” the last open files when Scrivener is pinned to the Taskbar (just like Word does, for example).
Iulian