Is there a way to group plugins into different folders in AE. I have a growing list of plugins and the drop down list of plugins is two columns wide now. I have plugins that could go into a common folder... Thanks.
Nope, not in the menu. There are one or two tools that fiddle with the matchnames (the internal reference names used by AE to sort effects), but this is not particularly safe - starts with downloading with some odd Russian site, may damage the plugins and because of how it works may affect project exchangeability with other users who don't have "customized". Therefore the smarter thing to do is to rely on the "Effects&Presets" palette, switch it to explorer/ finder view and sort your plugins on the operating system level by creating new folders for them.