Fixed crash after canceling file-open.

Ran into this after clicking Cancel on the prompt to choose which program to open a .ws file with.

Author: AnotherSymbiote

WitcherScriptMerger/Program.cs

@@ -72,7 +72,8 @@ public static bool TryOpenFile(string path)
                 Process.Start(startInfo);
             }
             else
-                Process.Start(path);
+                try { Process.Start(path); }
+                catch (Exception) { }
 
             return true;
         }