After copying a few words, I am unable to copy.

Using ADE latest 4.5 ver, Win7.

I am currently reading a book that has me looking up a lot of words. At first I was able to copy them but there must be an ADE limit to copying as I cannot copy any more words from this book. I have closed and reopened the app to no avail.

I wish Adobe was interested in ADE and would create a more dynamic version one could purchase.