Here is the procedure to get the configuration that will do what you want.
You need to go to the setting dialog as follow:
Once in the settings you should create a new table. Don’t delete the existing tables because they will become handy eventually. To create the table you must go on the Tables tab, then click on the New button. A Table called <untitled> will show up. You should rename it to Vocabulary or whatever name you prefer using the Edit Table Name field…
Once this is done you should make the Vocabulary table the default table, that is the table that displays when you start Wanikani and when you refresh the browser. You do this by clicking the up arrow until the table is in the top position.
Then you need to configure filters. You must make sure the Vocabulary table is selected and then you go to the Filters tab. There you click on the Item Type cleckbox to enable this filter. You select Vocabulary to display the vocabulary items. You also click on the Level checkbox to enable this filter. Then you enter +0 to select the current level. It is important that you have the + sign, a plain 0 won’t work. You leave all the other filters checkboxes unchecked because otherwise these filters will get in the way. This configuration will select all vocabulary items for your current level.
Then you go on the Contents tab to select which information will be displayed in the table along with the vocabulary items. There are many options you can explore. I suggest you begin with the ones displayed below. It is important that you leave the Random Selection at 0, otherwise the table won’t display all vocabulary items.
I hope this configuration will suit your needs.