New message popped up tonight - 

• All encryption key material has been deleted!  Please re-insert the media into a shielded computer.  You must be logged in with the same user account that Shielded this media device.

However, that is not possible... I've been using this thumbdrive on a variety of laptops and desktops for the last few years, including the laptop I'm currently trying to access the information with.  The original machine is no longer available. 

What has changed in the last few days????

How do I get around this?