Hello Justin,
Sorry to hear about your vexed state!
Yes - you'd think there might be a way to rename images, but it's not obvious!
F2 is for renaming a selected folder/album/tag/preset.
The only suggestions I could make are:
a. Export the photo & check "Add exported photo to current project"
b. Use "Save As" (Ctrl+Shift"+S)
- each of those options creates a "copy" of the image, so it's not renaming, as such!
PIX
PIX YouTube channel