I just got my first GUN Wallet 1.3 (desktop) a few weeks ago. All this crypto stuff is new to me. I upgraded to GUN 1.4 on my desktop with no problem. I copied my .guncoin to my laptop and installed another GUN Wallet 1.4 there with no problems. So... will having two GUN Wallets potentially running at the same time like this cause any problems?
Right now, you cannot have two wallets on the same machine as both are going to conflict with each other - most cryptocurrencies are that way. You get one wallet (with multiple addresses per machine). The good news, if you look at out roadmap and you will see that multi-wallet support is something we are planning on in a future build - that would allow you to have tow separate wallets on the same machine. Again, that is in the near future, but not now.