The most commonly caused reasons for this are the following: Problem open Excel.LA files in MS Office 2023 running on As is mentioned in article 13, Add-ins are installed by default, or they are not. Therefore, those who do not yet have the Add-ins can try one of the following methods: 1. To add a file to either, All Programs →Microsoft Office 2023 or All Programs →Office 2010, right click over it and enter the command: 2. To add a file to Microsoft Office Excel 2010, right click over the Office 2010.LA file and enter the command: 3. To add a file to Microsoft Excel (and other office products) add-ins, Right clicks over the Excel 2010.LA file and enter the command: How to add a file to Microsoft Office Excel? You can download Microsoft Excel 2010.LA file from the links in the tables above. As an example, the link is on this post: Microsoft Excel 2010.LA File. How to use this file? 1. Open Microsoft Excel 2010. Then, select Add-ins from the ribbon 2. In the file type, select the.LA format add-in file 3. Under Add-in, click on File Extensions tab and then click the drop-down and select LABEL: Add-in (in English) 4. Under Label Select Data Add-in 5. At the Add-In Properties, under the Advanced tab click on the LABEL line 6. Click OK. 7. Click on OK when you receive an “Open Office 2010” prompt. How to Open Excel.LA file in Office 2010/2013 or LibreOffice Lately there has been a lot of discussion whether LibreOffice can open the Microsoft Excel (LA)-format file. The answer is no. So don't use LibreOffice. Excel 2023 can open the file but is not yet stable enough to handle it. That being said, a lot of people recommend the use of LibreOffice to open the file, and so on. Let's see why you can't open the.LA format files in LibreOffice and what to do about it. You see, although the LA file is an Add-in file that has no direct equivalent in LibreOffice, you can still use LibreOffice to open the file. The file name is set to.