@Kitonum Thanks

@tomleslie 

As you said, it failed, however thanks for the suggetsion.

Actually, reading the name of the program is Maple 2015, but they always referred to it as Maple15 for reasons unknown to me. I was able to open it after discoverign the existence of Maple Player. 

@Joe Riel My bad, it is Maple 2015, however they always refer to it as Maple 15.

Thanks for the answer, but how do I open the file with SQLite (if you don't have time to explain a link to a page that shows how to do it would be fine)? I searched on the internet but only found ways to open .db files

Edit: I found a way to open it after dicovering the existence of Maple Player, thanks for the support anyway.