So I have created a pack (slowly getting popular) and today I released an update after fixing a big tree mod issue (it downloads as a .jar.zip file) which was what I had included in the previous update but in this new version I removed that and installed the correct .jar file but whenever I try and click update it says "update failed: a file is locked by another process. Cannot update this profile."
Further information: When I check pack options I have allowed the pack to be unlocked.
Extra Information: When I try deleting the pack it says: "Cannot delete profile. File or directory is in use."
I don't want to be that guy but have you tried rebooting your computer? If you've got a file locked in any program, that generally means the process/file is in use somewhere. Be that a borked Java process or anything else.