Colorsync Utility

For some reason, every time I download a pdf file, my computer has started trying to open it with colorsync utility. I select the file, go to file, get info and it says open with 'none'. I switch it to preview and it will open. But when I try to change all for similar documents I get the following messsage:
An error occurred while changing the application that opens 'file name' because not enough information is available. Do you want to open 'file name' with Preview? Then it gives me a choice of cancel, don't update or update.
Doesn't seem to magtter which one I choose. I can now open that file, but next time I have a pdf file, the same thing happens and I have to go to the file menu to get it to open. This started fairly recently.
I have run disk utility, repair permissions.
I have run colorsync utility verify and it says all my profiles are correct. Any idea what causes this?
Thanks

ColorSync Utility Printer profiles missing on macOS: A permanent solution. Many Mac users find that the ICC profiles for their printer stop appearing in applications such as Adobe Lightroom Classic and Adobe Photoshop. They’re often advised to delete and reinstall the printer, or to reset the macOS printing system, but in some cases the. Apple's Colorsync Utility is a great tool for digital photographers however most do not know how to use it. Here is a quick run down on how this great apple.

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ColorSync Utility for Mac OS X No specific info about version 4.7. Please visit the main page of ColorSync Utility on Software Informer. ColorSync Utility is software that ships with macOS. It is used for management of color profiles and filters used in Apple's PDF workflow, or applying filters to PDF documents.