Happy to report a grand success.
I deleted all files, both remote and local. Got latest zip file and expanded into local directly. Used Dreamweaver to upload all files without issue. Loaded up install wizard … and all worked smoothly, also creating database and connection file.
After installation, entered backend, and created and deleted content.
Uploaded image and changes sizes, all without issue.
All looks good. Will do further user runthrough tomorrow AM in case there is something to test I missed, but everything worked completely smoothly.