Unlike the Evaluation Edition, the Express Edition does not expire, but does place some limits on the way you deploy your server.
Available at no cost, the SAP Sybase IQ Express Edition supports all options and features available in the Evaluation Edition. The Express Edition includes a new IQ_XE SySAM license, which is installed as part of the Express Edition server package.
Unlike the Evaluation Edition, which limits server access to a 30-day appraisal period, the IQ_XE SySAM license does not expire. However, the IQ_XE license restricts the aggregated size of all IQ main dbspaces to a size of 5GB or less, and does not allow you to add any other incremental license options. The SAP Sybase IQ Express Edition is not eligible for production deployment and is not supported by SAP Sybase Customer Service and Support (CS&S).