PE frozen during GPX import

I have been importing a series of GPX files which collectively map out the GR11 route through the Spanish Pyrenees. All was going well, but near the final final PE froze completely, and I cannot ‘re-boot’ the app. I suppose this relates to a data overload. Is there any solution other than trying to download the app again? I am reluctant to do this as I have personal way points stored on a number of other maps which I’d prefer not to lose. Thanks