Hi Jennifer,
The file extension PRA is associated with Adobe Premiere Pro CS6 and CADRA by SofTech Inc. For your reference:
File Extension PRA.
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However, that’s not normal that your files become .pra files automatically. As a workaround, I suggest you make a backup of related files and then change their extension back to normal
to see the outcome. You can change it by right click your file and select Rename then edit it.
Please have a try and share with me your result.
Besides, please share with me related info as below to let me have a better understanding about this issue:
- The version number of your OS(Win+R>type CMD>OK) and Office(File>Account>Product Information).
- Which kind of files were influenced?(E.g. .docx/.xlsx/.pptx?)
- Does this issue happen to new created files?
- What have you changed before this issue happens?(E.g. UpdateOS/Office, Install application, Download some file)
Thanks,
Neo