Help needed to configure opening books in ChessOK Aquarium

[Ultrabean]

Hey all,

Every engine I play against in Aquarium GUI always only play either E4 or D4 as white. I would really like them to surprise me with a random opening every game.

I've tried both NarrowBook and WideBook included with the program but the engines still only play E4 and D4 and do not vary much when playing black either.

I've also tried to increase 'Book Width' in opening book settings but that doesn't seem to do much. Very rarely the engine will play C4.

The engines do occasionally play different lines after the initial E4 or D4.

There are lots of variables to tweak in the opening book settings but I have no clue what any of them mean and I couldn't find any documentation online. I sent ChessOK support an email but they have not gotten back to me yet.

Any help is greatly appreciated.

Thank you!