Hi - I just got a new computer - went from XP to Windows 7. I just started using Draftsight on my old computer about 2 months ago, so I'm just starting to learn it.  After downloading Draftsight onto my new computer and trying to open my old drawings (created on my old computer), I get the following error:  "There is no disk in the drive. Please insert a disk into drive /device/harddisk4/DR4."  Does anyone know how to fix this error? Thank you!