Think Kzman is correct. I might have done this with my old 95 years ago. I might have called Ruger service in a panic, thinking I'd broken my first pistol.
As I recall, the solution was to drop the mag, insert a bent coat hanger - something with about a 1/4 inch hook bent slightly beyond 90 degrees - to be able to pull the ejector downward.
Have to work the slide backward to take some of the pressure off the ejector.
What I found was it was a pretty firm pull. But that's one tough pistol. Worked just fine afterward. Never failed to press the ejector down when dissembling ever again. And never had a misfire with the P95 either, before or after.