Previous to upgrading to Newsbin 6.50 I had approximately 200 GB of header files stored in the data directory. Years ago, I had moved the data directory to E:\newsbin where I had space for all those headers. After upgrade to 6.50, the data seems still to be there but it is not shown in the Groups List. Clicking Options-->Setup-->Open Data Folder opens E:\newsbin, showing that the 200 GB of headers are still there.
On the Groups page it shows 0 days for the groups I have not updated. Other groups I updated after upgrading to 6.50 show a small number of days. Previously I had all the data that Giganews remembers about all these groups. Downloading it all again would be very inconvenient, to say the very least.
How can I get Newsbin to recognize and use the old data?