I just flattened and rebuild my home system recently, which had several VirtualBox VMs with snapshots. I backed-up all the VMs, VDIs and snapshots by copying the entire folder to an external drive. After the rebuild, I restored the folder to its original location, but when I open the VitualBox UI I get the error message:
Is there something I'm missing? Do I need to manually edit the .vbox files?
My host system is running Debian 7.4 and VBox 4.3.8