Hello Claus,
Note that you cannot purchase a license specifically for CCSv3.3. However, if you purchase a CCSv5 license, that license also can be used with any past CCS version including CCSv3.3 (and a v5 license is cheaper than the old v3 license). If you purchase a v5 license and provide your activation code, we can give you a download link to a CCSv3.3 version that supports F2810. After you purchase the v5 license, come back to the forum and start a private conversation with me.
http://www.ti.com/tool/CCSTUDIO
Thanks
ki