Nope, you can end it by making paperclips. The last button you click, in fact, will be the "Make Paperclip" one.
It is not at all clear that every hypothetical AGI would do as you say. It’s fiction. Anything can happen.
In fact, this AGI almost definitely wouldn’t accept the simulation offer. Otherwise our protagonist would have been making simulations and resetting them instead of doing the hard work of turning the actual universe into paperclips.
Make paperclip.