When trying to open a project in Citavi 4 you receive the error message "The physical sector size reported by the disk subsystem, is unsupported by ESE for a specific file type".
This error rarely occurs in one of the internal Windows databases that Citavi uses.
Start Citavi with the /noScratch option.
First, start Citavi. Then, right-click the Citavi icon in the taskbar and then right-click Citavi 4. Select Properties.
On the Shortcut tab in the Target field enter /noScratch at the end of the path. Do not forget the Space in front of the slash:
Click OK and then restart Citavi.