Hello lmbpack,
Thanks for reaching out to us and sorry for the inconvenience.
I am unable to access your URL given in first message.
Can you please tell us that, which type users and date you have saved in our current settings.
After the 1.7.4 we have added few new features and there is one migration script which migrate your all the old date to the new feature format.
It might be possible that, during the migration date if there is any issue might came then, it not saved and migrated all the data properly and it taking the load.
Also, if you have removed all the data then, you need to add it again manually. In our current plugin version there is no any import functionality available.
Let us know still if any.
Thanks,