I don't have, nor do I want anything, in the main toolbar. All I have is a menu bar with Preferences.
So when I installed this plugin I added it to the Optional toolbar; it's what I do with all new GUI plugins, while I decide if I want them, and how I will access them… Book list context menu, Favourites menu, All Actions menu, or a Shortcut,
What I got was a main toolbar with Seekquel [Sync], which I didn't ask for, and an optional toolbar with Seekquel [Sync], which I did ask for.
Why no icons? I have Icon size in
Prefs-Look & feel set to Off, I also have
Use two lines for the text under the icons checked, so would expect to see:
I didn't change the configuration.
BR