Editing spots and trips is currently only possible on Mapify's website. To do the following, please visit https://mapify.travel and log in with your Mapify account.
If you deleted your trip by accident, do not worry too much. Your trip's spots were not deleted, only the trip title tag combining them. To restore your trip, open any spot that should be part of this trip, edit this spot and create a new trip title tag with your trip name. Then, for every spot which was originally part of this trip, open the spot edit view and add your new trip tag to restore the trip.