We all have those moments (me more than most...)
All documentation is within the C:\uccnc\documentation folder, the only one missing is the manual for uccnc which you download off the website and I normally plonk in there with all the rest.
The macro_capability_detailed.htm is kind of the first starting point to understand the buttons, fields, LEDs, and check boxes.
There is one on screensets too.
Along with uccam and the next version has a comprehensive modbus manual too.
All nicely in one place not like m3 where it was spread across the forum or website (only the manual you need to download at the same time as the latest uccnc.... would be better if that was added to the install package too)
Rob