Dear user, please fill in the form below to download LITESTAR 4D Open, the freeware version of the program. You will receive an e-mail including the link to proceed with the download. Thank you for your interest in LITESTAR 4D. Remarks In order to activate LITESTAR 4D Pro/Plus configurations, it is necessary to install firstly LITESTAR 4D Open configuration and, after having launched the program, enter the activation code provided after the purchase of the license. LITESTAR 4D Pro/Plus configurations cannot be activated when the Maintenance Contract of the activation code used expired on a date prior to the date of release of the LITESTAR 4D version installed: in this case the program will continue to work in Open configuration (the date of release of the version of LITESTAR 4D currently installed is displayed in the HELP/About… menu in Litecalc). Users owning a Maintenance Contract are advised to keep the installation file compatible with their own activation code downloaded when activating the program. LITESTAR 4D and LITESTAR 10 are not compatible and therefore shall be installed in different folders.