Make sure the MainPanel exists before trying to reposition it. Fixes ticket #1038.

diff --git a/Config.lua b/Config.lua
index 13fe6ac..6529614 100644
--- a/Config.lua
+++ b/Config.lua
@@ -36,8 +36,7 @@ end

 local function ResetGUI()
 	local options = addon.db.profile.frameopts
-
-	addon.Frame:Hide()
+	local MainPanel = addon.Frame

 	options.offsetx = 0
 	options.offsety = 0
@@ -46,7 +45,10 @@ local function ResetGUI()
 	options.uiscale = 1
 	options.small_list_font = true

-	addon.Frame:Show()
+	if MainPanel then
+		MainPanel:Hide()
+		MainPanel:Show()
+	end
 end

 local options