File Extension needed

patfromlumberton wrote:

I am trying to download a upf file and it says I need a file extension. What program should I use?

an update to my sewing machine

I am not familiar with a upf file.

Talk to your sewing machine manufacturer for advice

It would seem you need to go to your sewing machine web site and download the firmware update application for your sewing machine.

Robert

What's a upf file?

If you are talking about a pdf file you can open it using finder or a pdf reader.

if it's really upf then you should read about the possible format here

https://fileinfo.com/extension/upf