A mul file extension is related to the SeeYou, a flight planning program used by glider pilots.
There is one other file type using
the MUL file extension!
.mul - Ultima Online game data
Detailed description
Software that open mul file
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What is mul file? How to open mul files?
The mul file format is associated with SeeYou, a Windows flight planning and analysis tool for glider pilots and paragliders, developed by Naviter.
The mul file stores flight data from SeeYou program.
The default software associated to open mul file:
SeeYou 
Company or developer:
Naviter d.o.o.
SeeYou is a flight planning and analysis tool for glider pilots.
Help how to open:
This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.
How to convert:
As far as we know, this .mul file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .mul file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open mul file, edit mul file, convert mul file, view mul file, play mul file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting mul files.
Programs that can create mul file - SeeYou flight data
Programs supporting the exension mul on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about SeeYou for create mul file action.
Unspecified and all other actions for computer programs working with mul file - SeeYou flight data
Click on the software link for more information about SeeYou. SeeYou uses mul file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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