https://community.graphisoft.com/t5/Modeling/backward-compatability/m-p/99297#M52273 Yep. It should work for AC8 and AC7 as well, I believe. Tue, 13 Jun 2006 23:50:04 GMT TomWaltz 2006-06-13T23:50:04Z https://community.graphisoft.com/t5/Modeling/backward-compatability/m-p/99296#M52272 <DIV class="actalk-migrated-content"><T>If I upgrade my usb key for version 10 can I still use it with my installed version 9?<BR /> <BR /> TIA</T></DIV> Tue, 13 Jun 2006 23:37:42 GMT https://community.graphisoft.com/t5/Modeling/backward-compatability/m-p/99296#M52272 Anonymous 2006-06-13T23:37:42Z https://community.graphisoft.com/t5/Modeling/backward-compatability/m-p/99297#M52273 Yep. It should work for AC8 and AC7 as well, I believe. Tue, 13 Jun 2006 23:50:04 GMT https://community.graphisoft.com/t5/Modeling/backward-compatability/m-p/99297#M52273 TomWaltz 2006-06-13T23:50:04Z