Welcome to the forum. I’ve just had a quick look around Scaler, and I can’t see this as an obvious option, where you simply pick the chord from a list of suggested variations.
However, you can create this chord yourself by navigating to the CHORD page by clicking on the CHORD button
or right-click on the chord and select EDIT CHORD from the context menu.
You can then remove the “offending note - e.g. the11th” by clicking on the note on the keyboard.
Although not very convenient if you have a lot of chords that you want to amend, it is a work-around until these chords are added, which I think would be a good enhancement.
There are a number of tutorials on the CHORD page:
Apologies for teaching you to suck eggs if you are already familiar with the CHORDS page.