If you install DataHub software v10 on your system and then decide you want to move back to an earlier version, you must uninstall the DataHub v10 software and then install the previous version. Failure to do so results in unexpected behavior. Installers for DataHub software v9.0.11 (and later) will do this automatically for you.
If you run into trouble, re-run the DataHub v10 installer and then uninstall it before installing the earlier version.
When DataHub Version 9 or 10 first runs, it makes a copy of the configuration folder
from your previous version, and then upgrades the configuration to be compatible
with v9 or v10. Your previous configuration is stored in the same folder, with an
extension of #.bak, where # is a numeric
sequence number. For example, if your DataHub configuration folder is:
C:\Users\MyName\AppData\Roaming\Cogent DataHub
Then the configuration backup folder will be:
C:\Users\MyName\AppData\Roaming\Cogent DataHub.1.bak
When you revert to a previous DataHub version, you need to manually restore this backup to its original name. The full process is:
Stop every DataHub instance and all tools, like WebView, the Remote Config program, DataPid, etc.
Uninstall DataHub Version 9 or 10.
Install the older DataHub version, but do not start it.
Using the Windows file explorer, rename or delete the configuration folder
(e.g., C:\Users\MyName\AppData\Roaming\Cogent DataHub)
Using the Windows file explorer, copy the backup folder to the configuration folder name. For example, copy:
C:\Users\MyName\AppData\Roaming\Cogent DataHub.1.bak
to
C:\Users\MyName\AppData\Roaming\Cogent DataHub
Start the DataHub program.