Third-party theme configuration resseting

[romuald_geo]

Hi All! I posted few days ago thread but haven't received any reply to it, so I'm starting another with different title.I have bisigi themes installed and with them it's no icon associated with mimetype "text/plain". If I use default ubuntu theme it's OK. So I'm wondering how to reset config files for non-default themes, and where actually these files reside. Assistance appreciated

[romuald_geo]

It looks like worthless asking for help in this forum about my issue. So admins feel free to close this thread

[wojox]

/usr/share/themes/

[romuald_geo]

Thanks wojox for reply.In directory you mentioned I didn't find any file tweaking icons for the theme.The file(s) I'm looking for must be in home folder.Because I've tried reinstalling Ubuntu but it didn't help I think because I have home folder mounted on other partition.