all of u'r user data resides in /home/user/MyDocs/.waze/*
to raise the log level you should edit 'data/preferences.ini' under your user data directory.
in that file you should find a section named '[%General]'. Under that section u should add the following line:
Then start waze. U can recognize that u are in higher debug level as there will be a new baloon with your coordinates in the upper left corner of the screen.