Seems in some cases the program can lose track of a disk. The following caused the problem:
- Create a 512MB disk with image, mount it
- Exit RAM Disk manager from icon tray without unmounting (there was no warning)
- Disk stays mounted
- When relaunching the program, the disk list is empty. Disk is however still mounted.
IMO when exiting firstly there should be a dialog that warns all drives will be unmounted with OK/Cancel, if confirmed with OK the program unmounts everything (saving to image where applicable) and exits cleanly making sure to keep the disk list.