I upgraded to EndNote 20 earlier in the year while working from home. X9 on an Intel Mac OS Mojave had become completely unstable, frequent crashing.
Then, I had to go back to my office which uses X9 on Windows. I imported my newer EN20 library’s PDF folder into my older X9 library and since then, I can no longer open and use this library. I cannot open it using EN20. I cannot re-import it into a fresh library in EN20. I cannot recover it using the recovery function. I cannot convert it. Nothing works. The library file is not on any cloud server.
What should I do to recover my library? I think this is an outrageous malfunction for a product as expensive as EndNote.