Windows 10: I have some files with my own extension, 'mlm'. In Windows 10 I had a default app set to...

I have some files with my own extension, 'mlm'. In Windows 10 I had a default app set to open them with. That's gone now in Windows 11. How do I set that up again?

:)

 

How to set a default app for extensions?

Hi Tyler,

Which app are you trying to set for .res extension?

Please try to check the app you are trying to set. Is it feasible with .res extension?

I suggest performing the steps below and check if it fixes the problem.

Go to Setting - Apps - Click on Default apps - Click on Choose default apps by file type.

On the left, search for .res extension

Across .res extension, tap on Choose a default

Try browsing for the app.

 

Cant set the default app for extensions

Hi Alex,

Thank you for writing to Microsoft Community Forums.

We'd like to get more information regarding the issue.

1. May I know which app you are trying to set for
   .res extension?
   
2. Could you check the app you are trying to set, if it is feasible with
   .res extension?
   

You may follow the steps mentioned below and check if it helps.

1. Go to Setting >
   Apps.
   
2. Click on Default apps.
   
3. Click on Choose default apps by file type.
   
4. Look for .res extension on the left pane.
   
5. Across .res extension, click on
   Choose a default.
   
6. Try browsing for the app.
   

Hope it helps.

Manjunath H

Microsoft Community - Moderator

 

Can a file extension(.flv) be added to Default Program Associations.

Hi Fred,



Thank you for posting your query on Microsoft Community.



I understand that you are facing issues associating a particular file extension with a program on Windows 10. I apologize for the inconvenience caused to you.

To assist you better, please provide the information:

When you say that "Default Program Associations", are you referring to the list of default applications in default programs settings?



I want you to be informed that all the file extensions is listed in the default program settings which is displayed under
Associate a file type or protocol with a program.



In default program list, all the programs or application will be listed. Then we can select each program as default program for opening a particular file.

I suggest you to refer to the below steps to make default program for a particular file extension.

1. Type "Control Panel" without the quotes in search box and click on it.

2. Click on Programs.

3. Then click on Default Programs and click on Choose Default for this Programs.

4. Select .flv file from the list.

Also you can try other steps to associate the a particular extenstion with the program.

1. Type "Control Panel" without the quotes in search box and click on it.

2. Click on Programs.

3. Then click on Associate a file type or protocol with a program
and search for .flv extension from the list.

4. Click on .flv and then click on Change Program.



Reply to us with the information, so that we can assist you better.

Let us know if you need any further assistance on Windows related issues and we will be glad to help.