You can add all of your equipment and put them into groups/sets in the Dekunu Cloud. You can then select which equipment you are jumping on your device, this can be done on the ground or in Plane Mode. See Selecting your Equipment for more info.
To add equipment groups go to My Cloud > My Equipment in your Dekunu Cloud account
To add an equipment group click Add New Group
Type in the name of your equipment group, for example, if you are entering your second set of gear you could name it "2nd Gear" etc. and save
Click Add New Item
Select the item you would like to add from the first dropdown and enter the details below, add it to the group you made earlier before clicking Add to save
Continue adding equipment until you have a full set of gear