Am I really expected to type the entire API key into my FTP client in order to upload to Photodune? Filezilla won't accept a cut-and-paste into the password box. It would be virtually impossible for me to earn enough money from Photodune to pay for the time it would take me to type that ridiculous string of characters!

Cut and Paste (Control V) into Filezilla works for me.  I just added this API key a few days ago.

I had no issues either with c/p

No problem here either