The wallet download link does not contain any other file than solariscoin-qt.exe, so there is nothing to turn off (solaris-qt).
Last night, i met same problem while tried to open 2 wallet.
Ok, sorry for my mistake.
Actually the wallet now opened when i just retried to open the exe file
Now i created new address inside the wallet and pasted it to the https://solaris.swapyourcoins.today/. However it said invalid address. How should i do the swap? I think the instructions are not sufficient enough. Enter your new address - where should i obtain one that fits the requirements?
So you can run 2 wallets simultaneously.
Where can i get the new wallet?