The problem with 64 bit is that they need to have a team to work for now in Win and MacOS version. When the 64bit comes to live they will need 4 team to work in Win and MaOS 32 and 64 bits version... and like you said you will not upgrade until they get the 64bit version... so they dont have the money to pay for the team. Another oint is that the 64bit users are less them 30% of Carrara users... its a very complicated task, but I am shure that they will do this.

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