#586 Export settings bug

[Ryan Clemens]

Create a new configuration and insert the following example script into the avisynth script window.

MT("""
a = last
b = a.Filter(Preset = "Standard", Setting=0, Setting="Something")
Filter(a, b, Setting=0, Setting=0, Setting=0, Setting=0, Setting=0)
""",4)"

Click the export all settings button.

The resulting registry file does not have the following string value
avisynthScriptMULTI_SZ, which results in many of my Avisynth scripts not displaying when the exported file is entered back into the registry.