how come i can no loner append objects and materials?

I just recently upgraded to 2.35a.

is there a reason i can’t append from .blend files created with 2.34? every time i try to i get an ERR:NOT A LIBRARY.? if anyone can help it 'd be great cause i have some ready made light setups i did a while ago in 2.34 and i want to get them into 2.35a