有关多个版本的LICENSE问题，请高手支招，多谢~

我装了15.51 以及 16.3 两个版本，刚开始还好好的，直接用switch切换下就可以了，后来不知道在注册表里改了什么东西。就用不了了。
请高手支招一下，在多个版本下，怎么去环境变量里设置这个LICENSE呢?
另外，15.51 以及 16.3 的capture 都用不了了。 15.51 的 capture 每次打开后，提示两个窗口后，就挂了~郁闷中~
15.51  capture 提示的两个窗口内容如下：
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Capture CIS
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This design file does not have an associated project (.opj) file. Capture will create a PCB project to reference this design file. If this design file is intended for use for something other than PCB layout, you should press No and create a new project using the New Project Wizard.  Do you want to continue?
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是(Y)   否(N)   
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Capture CIS
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This application, Capture CIS, has encounterned following unrecoverable exception, and hence needs to be closed down

EXCEPTION_ACCESS_VIOLATION::
One of the threads has tried to read from or write to a virtual address for which it does not have the appropriate access
Do you want to save all the open design now before Capture closes?
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是(Y)   否(N)   
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