KBrowser stores its data in files. You can store yourKBrowser data file in the cloud (i.e. your dropbox) and load the same file on all your computers. You can not have two people working on the same file.
To find the location of your data file click on the setting wheel in the side-toolbar and find the path in “file Settings”. To load the file activate your menu bar and use the file menu to load and save files.
You can also save the file on your USB drive and work off of your USB drive.