Ok.
Now that I am making more controllers for other people, I want to document how to setup my IDE environment.
It is easy, and you will be able to reprogram the boards if you do it this way.

FIRST, the main Arduino IDE
https://www.arduino.cc/en/Main/Software

I use the windows version, from the windows store. The others should also work, though I have no experience with them

NEXT, you need to install ONE TWO libraries.

a) the incredible Control_Surface Library by PieterP
https://github.com/tttapa/Control-Surface
Download the .zip here, and in the IDE, goto Sketch–>IncludeLibrary–>.ZIPLibrary
Use the github version, do not use the IDE repo version.

b) This may be optional. I didn’t need it for the Nano Board, but when I started using the NANO EVERY, i ran into problems and had to add the GITHUB version of this library.
https://github.com/PaulStoffregen/Encoder
Install like above. Again, the repo version failed to compile, I had to do this manually. This may be fixed by the time you read this.

STEP 3, plug in the board

When you plug in the board, you should see some prompts and drivers and such. It is pretty seamless, look to the Arduino manual if you have problems. So far I have been using the “NANO EVERY”. withOUT emulation in Tools->RegistersEmulation. So choose None(ATMEGA4809)

Step 4, reprogram

Once you are setup, I’ll send you a new sketch, or you are doing this from scratch and you grab it elsewhere.

Press Verify. If it verifies on your setup, upload it to the board! you may see this warning: “avrdude: jtagmkII_initialize(): Cannot locate “flash” and “boot” memories in description”, which you can simply ignore.

That is all.