So I've recently bought some Melda stuff, very cool effects that I'm looking forward to diving into. My question for you Sonar Melda users here: how do you deal with their stuff as far as plug-in management? Do you install the VST3s? How do you arrange the effects (because there are so many) in a way that's easy to navigate?

I use vst3 and let them sort themselves. They do a good job of sorthing themselves. I also have any other vst3 plugs along with the Melda plugs. Works great.

I only install the VST3. Using the Cakewalk browser The meld products are self organized into typical catagories with a couple  plugs un-catagorized. It seems about as organized as it can be done. You should not have any problems. I have the mixing bundles, the freebundle(I paid the upgrade during a 50% off sale) and a few other plugins from them. I think they do a good job.

Hm, I've never used VST3s before...I'll give it a go - thanks Grem and ArcRex.

I install both the VST 2 and VST 3. I use in Sonar mostly VST 3 for most plugins if they are available. In any event Melda VST 2s will install to a directory of your choosing. VST 3s go in the common files directory for VST 3. Sonar will put the VST 3s in their own category according to the subdirectory Melda creates for each type.  

I'm also in the VST3 camp - I've never had an issue with any of their plugins using this format, and their auto-categorization is well done. 
 

Melda Production is a good company. 

Good to see a video on Mmultibandconvolution finally, and 9.20