I assume I have to do it on the Master AP? I did try the button on a mesh AP, which made it go through a cycle that looked like it got re-added to the mesh, but once it was back, all logs from it were also back with all pre-reset messages.
The motivation is the issue I'm still having (https://forums.ruckuswireless.com/ruckuswireless/topics/200-5-10-0-291-doesnt-fix-the-packet-loss-fo...
) that led to an RMA of my MAP, but that didn't solve the problem.
I bit the bullet and did factory reset this morning (the "soft" way), which didn't improve things at all, and appears to have made them worse.
Will try the button, then will try swapping which AP is the Master.
Last resort - will probably go back to 200.4.x.