Thanks for your prompt responses.
Firstly on start-up this morning (Southern Hemisphere) everything returned to normal. i.e. all .PDF file had the usual Adobe logo and file type showed them as an Adobe Acrobat document.
I think I know what caused this glitch.
With Affinity Photo 1.10.1.1142 I put through a batch job of separated .PDF pages which needed cleaning and turning into .jpegs.
The original .pdf pages were in their own folder and the .jpegs were processed into a separate folder.
Affinity Photo does this sort of work very well but this was the fist time I had used .PDF pages as the source files.
On going to the source folder I saw that the usual .PDF logos were now Affinity Photo logos. Strange, so I check a .PDF file I'd just produced and sure enough it was now showing as an Affinity Photo file in the Type Column and with an Photo logo in front of the file name.
My Windows 10 is up-to-date and so I can only assume that this glitch was caused by Affinity Photo changing the file type of the .PDF files after processing.
Maybe this triggered Windows to rename all .PDFs in the file system and then returned to normal on boot.
I'll be watching with interest on the next job!
David.
