Sorry to hear that's happened.
This is simply a result of windows changing the default program use for compressed files.
It is very simple to change back, please follow the below steps:
- Right click on the zip file.
- Select "Properties"
- Next to "Opens with: Simstaller" click the "Change" button.
- Select "File Explorer" then press "Ok"
Your compressed files should now return to the default "folder with the zipper" icon.
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