I forgot to mention, you usually won't lose data by just running an older version of wine, the .wine folder will only be created and filled with default settings, if it doesn't exist alreday. Maybe some settings (winecfg, registry) won't work as expected with older wine. It still maybe useful to move the old directory and start with a clean new .wine directory to avoid any problems with dll overrides and winetricks settings and other side effects caused by other installed windows apps.
