accidentally open package file with internet explorer

They are .package files and opens with the Sims 4. That you have associated them with Internet Explorer (or more likely Microsoft Edge) does not mean that they will stop working.

any way to make it like it was? 

Yes, But it requires resetting all associations. Which means you would manually have to set associations again except for Windows defaults. Probably not worth the hassle but to do so go to Settings, Apps, Default apps then click the Reset button. Instructions are for Windows 10.

i already did this and it didn't change them. still looking to put it back the way it was

@lizmac21 

There are no other way to do it.

under here, choose default app by file type, for packages and partial. they are on internet explore, probably not correct. what do i change them to to make it right?

thanks!!! 

If you have S4Studio (or even S4PE) installed, you can right-click a .package file to highlight it, then left-click on it while pressing the Left Control key, and the uppermost menu choice should be 'Open With', which will allow you to change the file's program association, then choose either of those programs. (Windows 10)

Cheers.

@lizmac21 

By default it is unassigned. I already posted how to get it back to that state if you want to.

I also did the same thing and would like to reset it, the problem is it I have no idea what to switch the .package app to. What was the original software called?