KNX virtual (v2.6.0) with ETS 5 (v5.7.7)

Hello,

I'm trying to include a KNX Virtual device into ETS 5.7.7 (Lite license) but I keep getting 

"An internal error occurred.
The schema version 'http://knx.org/xml/project/22' is not supported"

Do someone know why this happens?