Hi, I am Van. I'm an Independent Advisor and a Microsoft user like you. I'll be glad to help you today.
You can change the default app by file type by navigating to this location. Press the Windows key + I, then go to Apps > Default apps, then click Choose default apps by file type. You could also right-click on the file then select properties. Click the Change button in the Opens with, then select the app that you want the file to be associate with.
Please let me know if you need any further assistance, I will be glad to assist.
Best regards,
Van