When I start RootsMagic I get an error GetFontUnicodeRanges

The following instructions are for RootsMagic 7 and earlier.

If you get an error message something like this:

rootsmagic.exe is linked to missing export GD132.dll GetFontUnicodeRanges

It means you are trying to run RootsMagic 4 (or higher) on Windows 95, 98, or ME.  RootsMagic 4 requires Windows 2000 or later.  Those older versions of Windows do not have the Unicode support needed by RootsMagic 4 (or later).