Missions still there but disappeared after system restore
 

I did a system restore now all existing .BMS do not show up for selection in the Game menu interface.
To resolve I have to alter them slightly and re save.
Anyone encountered this bug?

Windows 7 Home Premium
4 GB DDR3 Dual Channel Memory
1 GB Graphics (AMD Radeon 5770)
Gigabyte Combo Mobo
Intel N10/ICH7 Bridge