Using Windows 7 clipboard (Copy/Pase) in Captivate

I am vary wary of copy and paste for images from outside Captivate. I know that Windows 7 will paste an image into the library, and it may look fine on the screen, but after further investigation Windows 7 is pasting images as LOW RESOLUTION .bmp files that don't have any further resolution than what is shown on the screen.

The slightest resize, or movement, of the image on the stage results in unacceptable image quality upon publish.

My workflow has become to convert any image to .png, preferably through Photoshop to ensure transparency, then to import the file into the library (drag and drop also has issues), and finally place on the stage, resize and relocate.

I had something like this happen today. I could paste on some slides, but not on others. The paste option was grayed out on those slides. As it turned out, I just tried right-clicking the slide, and selecting Unlock Slide from the resulting drop-down menu. That fixed it! I don't recall locking any slides, but now that I know how to unlock them, life is good again.

Same problem using Captivate 8, but it is intermittent.  I can paste from windows clipboard directly into captivate, but now it just remembers the last thing I copied in Captivate and pastes that instead.  If there is a way to re-activate the paste from clipboard, I want to know.  This should never be disabled.