How to set Gnumeric to Save in Excel Format by Default.
Unfortunately we live in a world dominated by Microsoft products, and when we save a file it needs to be in a format that others can use. While Gnumeric is in my opinion a better product, and much more versatile than Excel, the reality is that Excel cannot open a .gnumeric file.
So it often annoyed me to have to select the filetype that I wished to save in and add the .xls extension to my filename as well.
But a little exploration led me to an easy solution if you primarily save files in the Excel .xls format.
All you need to do is locate and edit one file. The location may vary for different distributions (but I believe it should not, if someone finds the file in a different location please let me know and I will update accordingly Vladd44@Vladd44.com).
Locating the file you need to Edit
1. First you will need to know what version of Gnumeric you are using, this will affect where the file is located. To do so, open gnumeric and select Help, About