That is my bad. I updated the add-on to allow an index of 7.
Please replace the settings.xml (or just overwrite the whole folder) and try again.
A new driver will be ready soon, which doesn't require per-device DTBs, only a simple configuration file with all that's needed.
But with the current driver, I think that DTBs have not changed since 8.90.4.
Thanks, no joy though sadly, setting Index 0 - 7 blanks the first digit of the time. Would a vid using the test script help? Still no icons either.