i was testing some datapacks one by one and when i wanted to delete one i got Error message saying "the file in open in another program" so i exited the world and tried again but the same Error occurred so i closed the game relogged my user and then i was able to delete the datapack .zip file
MC-183370
can't delete .zip datapack
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Yes. That is how program files work. You can't delete them while the program is still running, you have to close it first.