I have the exact same issue.
Started around the 18th. Had also a error message in Vera about that it could not download all plugins. And it seemed to be write protected or something because it was not possible to change config, erase plugins or devices and change some devices status.
Have now reverted back to a backup from two weeks ago. A lot of work re-adding the devices that didn’t work after that and make all config again. Now everything is working again except DataMine GUI. I can see that it still logg new data on the USB-memory.