in notepad++ version 4.9, this problem seems to have re-appeared. i was using version 4.0.1 up until recently where switching between tabs did not lead to an unfolding of all blocks in the previously accessed tabs. but version 4.9 (the only one i tried since 4.0.1) unfolds it all. is this a new feature or an old bug reintroduced ?
thanks for a great editor,
I too am seeing this with the latest release, unfortunately.
My vote for retaining the folding across tab switches is 'cast'.
Thanks, Don (& Devs)!