Alpine Quest Map Problems

I am using Alpine Quest with some old Memory Map OS maps.
I can load one map but when I try to change to another map i get the message "Lite version feature not available with this free version " and a link to the Google Play Store.
Has anyone else got this problem or better still solved it.
I should add that the app works fine on another phone with normal Android



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Many free versions are limited in the number of maps you can use. OsmAnd is very similar (allows 7 downloaded maps in the free version).

The version on my other phone is so old that it must pre-date the paid option but still has full functionality. Luckily i have found there is a version that allows you to license it via pay pal and hence by-pass play store so I will go down that route.