Many, many programs have memory leaks; unused memory that is not returned to the OS when it should have been. The OS itself also has memory leaks - no program is perfect, and no OS is perfect. Poser has larger memory leaks than usual. You can check that by freshly starting Poser with a default scene, note the memory usage (Task manager), then do all kinds of things and finish with File->New. You end up with exactly the same scene as when Poser has freshly started. Now look at memory usage, it'll be more than when you just started. The difference is leaked memory. This is why it's very advisable to save a scene after a couple of changes, and to save, exit and restart before starting a memory-intensive action - such as rendering.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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