I don't have Browser Assist patron's version to see how plugin loading works there.
VAM doesn't show thumbnails for plugins when loading them. Does BA shows them if available or is the Hub thumbnail used instead?
Ummmh ... I haven't used the free version of BrowserAssist in ages, so take with truckloads of salt, but I'd be surprised if custom thumbnails were a paid-version-only feature (Mostly because JayJayWon hasn't worked on that one in ages)
What I do to bind a thumbnail to a plugin in BA:
* Go to BA main window (the in-scene window, not the session-plugin GUI)
* select resource-type: "Plugin" (not PluginPresets!) -> You see loads of white squares representing the respective .cslist and .cs files (white because they have no associated thumbnail)
* select "Plugin_I_want_to_select.cslist" or "Plugin_I_want_to_select..cs"
* Directly above the bottom window/frame, there's a tab "info" -> click that.
* There's a button called something like "select thumbnail (from drive?)"
-> NOTE: If you can't see the button, you might have to "scroll right", ie grab the horizontal scrollbar at the bottom of the frame & push it to the left
* Browse to thumbnail folder, select pic
Voila! Now your .cs/.cslist/.dll file has a snazzy thumbnail! Only 678 more to go! (x)
I have my thumbnails under "Custom/Images/Thumbs4UIAssist/" - I built up a thumbnail collection manually, from the respectivve thumbnails here on the Hub. I can share, if you're interested?
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(x) I recommend creating a thumbnail-collection sorted by creatorname - then you can filter by creatorname in BA, and in the filebrowser window, when you browse inside your thumbnail-folder, there's a checkbox "keep editor open" (or something) at the lower right. That way, you don't need to navigate the full path for every single .cs/.cslist file