You can refresh your list of forms by pressing the refresh icon in the top right corner. If you hold down for a longer period, it will trigger a full update which basically downloads all the forms once again.
iPhone / iPad
By dragging the list downwards an extra line will appear with a circled arrow pointing downwards and text that reads “Pull down to refresh”. When you pull the list enough, the text will change to “Release to Refresh” and the arrow will turn upside down. If you do this, the list will be refreshed