Hi, I finished the upgrade from 2.8.2 to 3.3 but after entered master password and wait until it is done.
I login into the backend and see the same 2.8.2 version WHY?
December make sure you extracted the files correctly.
Do the update again if needed. When your file manager/SSH asks for files Override, always select Yes for all files.
On some servers you need access via ssh and unzip it. Some times the file manager doesn't works.