Is it possible to reset the advance?
I've leaved my german drills for more or less a couple of months. Now, I do not remember what I've learned (I realize I've learned a lot now!) so I want to begin my german courses.... is there any possibility of begin again or do I need to resort to the vocabulary tab?
There is currently no possibility to reset your progress. You may want to redo your lessons from the beginning or indeed to use the Vocabulary section to practice specific words. You can also check the Vocabulary section first, read the words with their sentence examples and then to go the lessons or practice sessions.