I can’t really say anything about the numerous amount of errors you seems to experience, but if your using the standalone client, your saved game should be in “Documents and Settings/user/local settings/application data/wayward”, at least that where it was for me(i’m using windows xp) and It seems like you can make a backup of you game by simply making a backup of the “Local Storage”, but when I when Vaughn anwsered me he said I might a well copy the whole wayward folder.
you might have a different version of windows but your saved game should be somewhere local settings related I think but I might be wrong.
edit: damn I took too long to anwser
edit 2: in windows xp for me its “Documents and Settings\user\Local Settings\Application Data\wayward” but its windows xp professional