Aladdin Expander is free software for Windows that will decompress most popular forms of file compression including ZIP, GZ, and ARJ files. If you are having trouble opening certain files, you may want to try using this utility.
Please be aware that Aladdin Software has become Allume Systems. Also, there are newer versions available, but the one that is supported is still 6.0.
Download and Installation
(Current faculty, staff, and students of Columbia University and its affiliates are eligible to download.)
Aladdin Expander for Windows