STO here. Just got a used 2004 EZ Guide Plus to help with fertilizer and spraying.

Unit has never been upgraded. I get blocked from EZ Guide website firmware download.
Do I have to go through dealer to get latest firmware? How much does that cost?

Unit works great for what I am doing so it's not a must do but would be nice and
help if and when get to add EZ Streer.

Thanks in advance for any info.