The update over Steam today appears to have wiped out all my addon settings and layout profiles

[Reticuli 14]

The update over Steam today appears to have wiped out all my addon settings and layout profiles.  When I went into Arma 3, it was also saying nonsense about 'Welcome to..." blah blah blah or "Thank you for..." blah blah blah.  Briefly it also seemed confused and for one of the times I booted it up it was using a profile from like a month ago.  Next time I booted it up it was using defaults.  I was able to use a two week old profile that at least recovered my video settings, but that's the best I can do.

Oh, and all my custom addon keys are wiped, too.  Joy.

And just found out my maybe 200 or so arsenal loadouts are all gone, too.

[stanhope 409]

We can't really help you with that unless you ever made a back-up.  Stuff can go wrong, always make back-ups.