You could try factory resetting, but this will wipe all your apps and data, including your internal sd card. Not being rooted makes backing up anything other than the sd pretty much impossible though so you'd have to reinstall and setup everything from scratch.
Its possible it could be an issue with the app itself, but ive not heard anything else about it so I cant say how likely this is.
Only ither option I can think of is to make sure auto update apps is off in the play store, then uninstall the maps update and try running the older version.