File extensions association (.BAT,.CMD)

I am using a small freeware called PFE32. This editor lets you associate file extensions to it so that when you click files with these extensions, they are automatically loaded and edited by PFE32. The problem is that even with these associations disabled, Windows doesn't know what to do with .BAT and .CMD files anymore and keeps asking which program it should use to open them. Just like unknown file types. Is there a way of getting Windows to behave as it did before my mistake ? Thanks

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