Has anyone seen a message similar to this when trying to attach a document, usually a pdf to an email? ''O:\XXXXXXXXXX.pdf could not be opened, because the associated helper application does not exist. Change the association in your preferences.'' Also, when someone send me an image file, I can't open it directly from the email. I have to download it and then open it. This isn't as big of an issue as the above, but I thought I'd ask it too. Thank you Windows 10 Thunderbird 115.10.0