Always download directly from to avoid malware or fake “cracked” versions from unofficial sites.
A: You likely have the software installed on another machine. Deactivate it there first (Help → License Manager → Deactivate) or contact TI support. ti nspire cx ii cas student software download
A: No, one license = one active installation. However, TI allows deactivation/transfer if you switch computers. Always download directly from to avoid malware or