Paste options grayed out in wave editing

I am not sure on what I am missing, but when I try to paste a wave selection, all the paste options are grayed out.
I am editing a 32 bit 44.1Khz wave file.

What the heck am I missing?!?!
Thank you!

You need to copy (in WaveLab) something in the clipboard.

Anyone able to figure this out? I’m having the same issue. Can’t do a mix paste. Overwrite works just fine, so does crossfade, but “mix”, “append”, “prepend”, and “multiple copies” are all greyed out. I have WaveLab Pro 9.5

Are you using WaveLab 9.5.50?