Yes updating is difficult if a lot was customized, but no, it's not that easy as you think. Therefore I can't see it happening anytime soon. There's just too much user stuff stored outside the profile in various places, e.g. skin button configs - unless a user has copied the default skin folder himself or is using another skin (and lately even has to copy the template toolbars.cfg himself). And user macros are by default stored in the root folder too, but they have own names which protects them from being overwritten.
But are you sure your old profile is really lost, not just elsewhere? The location can easily be forgotten when switching between portable and installation-versions (=empty file "profile.ini" exists inside KM root folder or not), but that doesn't usually mean the old folder were deleted. Perhaps try creating that file if it doesn't exist, or rename if it does, then restart.
Edit>Configuration>Profile folder opens the current profile folder in a filemanager. Other profile folders can be in the same parent folder. And this parent folder is either inside KM root or in the systems user appdata somewhere.
But profiles are never intended to be lost accidentally when updating. If I remember right there was only a fatal bug with some 75.1beta versions under certain circumstances (portable profile, updated 2x) where this could happen.
(sig)
New unofficial K-Meleon 76.4 (KMG76.4) available, in own subforum.
Based on Goanna engine, called 'test' builds forever but more stable as 75.1 acc. forum members. It's 1-2 generations ahead of predecessor KM76RC-2016
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