I can not open .kurviger files and GPX files from Total Commander any more:
But I can open the same files from Kurviger via Routing / import.
I tried to to open a Kurviger file out of file manager(German name: “Dateimanager”, supplied with Android 7 on my Asus ZenPad 3s 10 (z500m) ) - that opens a 2nd instance of Kurviger, icon from file manager, with strange behaviour of the “original” instance up to system crash, examples:
Kurviger Pro 1.14.3
Android 7.0 (API 24)
asus P027
2048 x 1536 (320 dpi)