yes, lead group is widely undocumented unfortunately, sorry about that.
Before you click “Correlation Between Regressors and Volume Intersections”, you need to calculate the DBS stats, i.e. click on the “Prepare stats” button. I hope this works, haven’t tried for some while – let me know if it doesnt.
The info should also be inside the ea_stats.mat file of each patient after that.
Regarding the Accolla atlas, it seems that you have an outdated data folder from an older version than 1.5 – you can simply delete the atlas_index.mat file and it will be regenerated based on the niftis on the next visualization call. Still, I’d suggest to update the datafiles, i.e. make a clean new download from the website.
Re the 2D viz – this seems to be a bug – I guess you could circumvent it by once clicking on the settings dialog of the 2D visualizations and saving these settings. Seems there are no default settings stored in your installation somehow.
Hope this helps, let me know if you have further questions!