Notes about the UPM file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The UPM file type is primarily associated with 'PenMail' by UC-Logic Technology Corp.. PanMail is part of UC-Logic's PenSuite which is a collection of out-of-the-box tools and utilities for users to explore the functionalities of their PC tablets, and allows them to experiment with annotating and signing documents, basic painting and drawing, composing and sending handwritten E-mails, and make digital whiteboard presentations, without the need for third party application software.
Detailed information for file extension UPM:
Program ID: PenMail.Document
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.