Quote: "Either way, very strange."
It certainly is.
Here's another strange thing.
TGA files open without problem on my laptop. I have therefore just checked the usual Tools/Folder Options/File Types route for TGA files. On both the PC and laptop they "open with" DxTex.exe - BUT, on the laptop the file types menu gives a choice between "Change" and "Restore" for TGA files, whereas the PC gives the choice between "Change" and "Advanced" for TGA files.
Anyone know how to restore the default settings for TGA files - or other action I can take?