Hi all,
iolite v4.10.11 was just released and part of that release was an update to the iolite_helpers.py file. When clicking on 3D Trace Elements, you might see an error message like:
Error Value: cannot import name 'qsettings_bool' from 'iolite_helpers' (C:\[iolite path]/site-packages\iolite_helpers.py)
Error Traceback: File "C:/[iolite path]/Plugins/Data reduction schemes/3d_trace_elements.py"; line 67; in <module>
from iolite_helpers import fitLine; formatResult; qsettings_bool
Assuming you haven't made any custom changes to your iolite_helpers.py file, the easiest way to fix this is to go to the advanced section of iolite's preferences and click the button "Site packages" under restore default files. Then restart iolite.

This should fix the issue. Please feel free to reply to this post if you have any troubles.
Kind regards,
Bence