Sap2000 Portable -

: If you need to work without an internet connection (e.g., on a plane or at a remote site), you can "check out" a license for a limited time (up to 1 year for some license types). This locks the license to your specific machine for that period. Standalone License Transfer

Since CSI does not release a portable version, what you find on torrent sites and forums is a "hacked" version. Users often discover that these versions are unstable. Sap2000 Portable