I have multiple julia versions installed (merely through never deleting 
them). At every new version I've called `Pkg.build("IJulia")` from the 
command line. This adds the new kernel to the list of kernels in the Kernel 
-> Change Kernel menu of the Jupyter notebooks. Does that not work for you? 
Maybe you need to update Jupyter (via conda?)

On Tuesday, September 20, 2016 at 1:24:41 PM UTC-4, Roger Whitney wrote:
> On Monday, December 8, 2014 at 2:58:49 AM UTC-8, Simon Byrne wrote:
>> I have multiple versions of julia installed on my machine. Is there an 
>> easy way to specify which version of julia I want to use when running 
>> ijulia?
>> Simon
> JuliaBox has configured iJulia so one can select which version of Julia to 
> use in a notebook. That is I can run one notebook using Julia 0.4 and 
> another notebook using Julia 0.5 at the same time. I am currently teaching 
> a class of ~60 students using Julia. I have students turn in their 
> assignments as Jupyter notebooks. Now that Julia 0.5 is out it is going to 
> be difficult to keep everyone in the class on the same version of Julia. It 
> would be very useful if I could configure my local copy of Jupyter/iJulia 
> to support two versions of Julia at the sometime. Does anyone know how this 
> is done?

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