I'm using winbox in my linux box with wine. After upgrading to 2.9.12, it is crashing everytime i try to select the interfase tab. It is hapening both with the x86 an RB versions. No problem with 2.9.11.
I've had this happen in windows when the packages were corrupt during the download from the router over WAN links. In windows if you delete the following folder: "%userprofile%\Application Data\Mikrotik" and redownload winbox from the router it usually corrects the problem. Find out where wine stores the winbox package files and remove the directory then try and reconnect to the router.