Change a hosted image

Some time ago I created an html email footer using an image hosted in squarespace... I need to change the logo (and ideally retain the same URL) but cannot seem to navigate to it in my square space account - it does not seem to be in my asset library anywhere! I have completely forgotten how I created it in the first place. Please can anyone help me??

If you uploaded it as a file via the Pages menu and a link then you may be able to keep the link URL. If you were using a image uploaded to a gallery or image block, then the URL is unique and you'll just need to update it with the new image URL in your email footer.

Thanks Ziggy - that's useful info, but my trouble is that I don't know how I uploaded it. I have read (and vaguely recall) about creating an unlinked page with just the image on it - however I cannot find that in my page list. Neither can I find the image in my Asset library - its a bit of a mystery, but the link is still appearing in my email footer. I just don't know how to access it.

Final place you could try is in the Custom Files under Custom CSS.

Can you share the URL, that can give a hint as to where it was uploaded.