file correction

[ROBERT PULLIAM]

I have a file that is one long string.  ie  st*234*685~bd*tuy*45*cvb~se*123*1234567

iI would like to find all the ~ and replace with a manual line feed.  At present I am copying  the files from unix to windows and using word with replace to do this.  Would like to be able to do it in unix,   Using sco unix.
Is there an ed, sed or grep comand that will find and replace?
Any suggestions - thanks - Robert Pulliam MD
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