MathType 软件问题

每次打开MathType会出现一个错误提示内容如下：MathType requires a newer version of the MT Ectra (TrueType) font than is currently installed.please reinsall MathTYpe (using your CD or downloaded installer )to obtain the correct fonts.
卸载安装了好多次还是这样，请高手帮帮忙
刚刚又打错的单词，这是修改之后的MathType requires a newer version of the MT Extra (TrueType) font than is currently installed.please reinstall MathTYpe (using your CD or downloaded installer )to obtain the correct fonts.

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