Please contact support att axcrypt dott net . Please note that it is never a requirement to purchase anything to decrypt an encrypted file on your PC or Mac. You only need to know the password.
If you are literally getting an “access denied” message, this has nothing to do with AxCrypt. You may have moved the files from a different Windows computer, and lack the NTFS permissions (google “take ownership ntfs” for more info), or you may have encrypted the files with EFS, Encrypting File System and done a password reset or re-install of Windows (google “efs access denied” for more info).