How to Chnage Logo/Header Image

Hi,
I've uploaded my logo and it is not showing up. In Safari, it is the old canvas logo, and in Firefox, it is just the Alt text. ? I've changed the src in the index.html file, can't figure out why this won't work or where else I should be making a change. I'm using the demo construction template.

I'm a little rusty and kind of a beginner, and this template seems pretty complicated to figure out- maybe not the best choice for my needs. I've read the documentation, but I feel like there could be more explanation of how the parts work/ where changes need to be made.

site: www.heatpumpguy.com

Thanks for any help.

Still looking for some help with this. Image names & paths double checked, it seems like it should be a simple thing, just can't figure out what the problem is...

OK, super simple error. The img src was logo2x.png, and the uploaded img name was logo2X.png. Now both are consistent. On to other challenges...