Files with dvr file extension are used by DESQview, very was very popular software on MS-DOS.
There is one other file type using
the DVR file extension!
.dvr - Microsoft Windows XP Media Center TV recording [common]
DVR file extension - DESQview data
What is dvr file? How to open dvr files?
File type specification:
The dvr file extension is also related to DESQview, a text mode multitasking program developed by Quarterdeck Office Systems which enjoyed modest popularity in the late 1980s and early 1990s.
Running on top of DOS, it allowed users to run multiple DOS programs concurrently in multiple windows.
This dvr file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.