My old, original, bq e4.5 Ubuntu edition is still functioning under the latest 15.10 version of the system available to it. I have been looking into migrating to UBports 16.04 version. All the instructions for such an update seem to assume that my phone is running Android as the starting point, but it isn't! I have downloaded the installer onto my Ubuntu 18.04 desktop. Is it safe to proceed with this installer, ignoring the references to Android, or should I hold off? My phone still works, and does what I want of it, but of course it hasn't had any security or functionality updates for ages.