Command line parser fix using list options with -add suffix

docs/changelog.md

@@ -1,4 +1,8 @@
 
+# v7.0.0.5 Beta (2023-??-??)
+
+- Command line parser fix using list options with `-add` suffix.
+
 # v7.0.0.4 Beta (2023-12-19)
 
 - When mpv.net is started for the first time from a new startup location,

src/MpvNet.Windows/Help/WinMpvHelp.cs

@@ -35,7 +35,7 @@ public class WinMpvHelp
             }
             else
                 Msg.ShowInfo("If you want to add mpv.net to the Path environment variable later," + BR +
-                    "you can do so with the context menu (Settings/Setup)");
+                    "you can do so with the context menu (Settings/Setup).");
         }
 
         var result2 = Msg.ShowQuestion("Would you like to register video file associations?", MessageBoxButton.YesNo);
@@ -51,7 +51,7 @@ public class WinMpvHelp
         }
         else
             Msg.ShowInfo("If you want to register file associations later," + BR +
-                "you can do so with the context menu (Settings/Setup)");
+                "you can do so with the context menu (Settings/Setup).");
 
         RegistryHelp.SetString("Setup", Folder.Startup);
     }

src/MpvNet/Player.cs

@@ -435,7 +435,7 @@ public class MainPlayer : MpvClient
             {
                 string name = pair.Name[..^4];
                 string separator = name.Contains("-file") || name.Contains("-path") ? ";" : ",";
-                SetPropertyString(name, GetPropertyString(name) + separator + pair.Value);
+                SetPropertyString(name, (GetPropertyString(name) + separator + pair.Value).TrimStart(','));
             }
         }
     }