private void OpenGCM(string FileName)
{
GCMFilePath = FileName;
// Read file
using (Stream GCMStream = OpenGCMStream())
{
GCM = new GCM(GCMStream);
}
// Add to recent file list
RecentFileList.AddFile(FileName);
RecentFileList.SaveToDisk();
// Create tree nodes
GCMNode Root = GCM.CreateTreeNode(FileName);
treeView1.Nodes.Clear();
treeView1.Nodes.Add(Root);
SetContextMenuStrip(Root);
}