The “UNKNOWN” category means that there are transactions without assigned category. As soon as you assign a category to these transactions, the “UNKNOWN” category will disappear from the Categories tab. Do the following to resolve the transactions with “unknown” category:
- Click on the Categories tab
- Click on the Unknown category line
- At the bottom, you will see the list of transactions (for selected month) without assigned category.
- Right click each of these transactions and select “Change Category” and then click on the Category it belongs to