I follow the instructions at: https://www.aloriumtech.com/openxlr8/
I reached point 4 (Simulation) and then “In Arduino, select the following”
1) Tools-> Board-> Open XLR8
2) Tools-> Floating Point XB-> Enabled
I cannot see the menu entry “Floating Point XB” in my Arduino 1.8.5. (I have installed Alorium XLR8 Boards and have tested successfully my XLR8 with Arduino sketches.)
We’ve recently completely revamped the OpenXLR8 flow, but one of the consequences of that change is that the simulation is not working at the moment. We are working on that and will post an update when its resolved.