Audials App for older Windows Versions

I did a reset on my win10mobile phone. Now I cannot reinstall the app, because the app is only for new windows-versions. But it worked fine before reset and it is still listet for mobile phones. I think it could be changed easyly for older windows versions. Or the app for mobile devices could stay an older versions, like many other apps do. Or Audials could offer an .appx file on their homepage to install it outside the windows store. Please help, audials support!