I don't know when this changed and why, but for me when working with maxwell materials the slate material editor feels much slower than a year or so ago. It's really frustrating.
Working with multi materials I constantly get this annoying notification and the "refresh" takes forever

Is this related to the display of the bitmap nodes? When double click at one of them i sometimes get a complete freeze for almost a minute. The texture info is not displayed, only after i minimize and reopen the panel.
Unusable for me. I don't use the nodes. So it would be really helpful, if the "Hide Child Tree" setting could be respected after editing the material in MXED and no new material nodes would be generated (or the old one removed).

(maxwell, plugin 3.2.6, max 2014, win 7 x64)
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Thanks Luis, it's great to see progress with MW!

Thanks Fernando!