To get access to your keywords and tags from the old suite, you have to migrate them into the new interface.
First you hover over the project name in the top right corner, you will then see a pen symbol that you can click on to get into the project settings (see screenshot).
Afterwards click on "keywords" on the lefthand side, you will then see an explanation and the button "start keyword migration". After clicking this button and saving the changes the keywords and tags will be migrated and the ranking data will be available after around 24 hours.