No, it’s not likely that the 1.6 version has “1.0.4” on the launch screen. That would’ve been caught already in testing.
Recall I said that when you type in julia it traverses the folders stored in $PATH. And it does so sequentially and as soon as it finds the first folder where julia resides, thats the one it launches.
Notice how you modify your $PATH:
export PATH = "$PATH:$HOME/Julia...."
which basically adds your 1.6 folder at the very end.
What this means is that you likely have another julia binary (the 1.0.4 version) in one of the folders stored in $PATH. If you run
affan@XPS13:~$ which julia
/usr/bin/julia
it will tell you where the actual binary is located. You should likely delete that binary as its the old version. I have a feeling that if you installed 1.0.4, the binary likely exists in /usr/bin/julia or /usr/local/bin/julia
Can you tell me what the output it for which julia?