Fix bug that was causing CameraFrames folders to remain beyond the 30-day period

Author: bwdev01

src/logger.cpp

@@ -188,10 +188,15 @@ void Logger::RemoveOldDirectories(const wxString& filePattern, int DaysOld)
                 bool more = dir.GetFirst(&subdir, filePattern, wxDIR_DIRS);
                 while (more)
                 {
-                    wxString rslt = subdir.AfterFirst('_');
-                    if (rslt < oldestDateStr)
-                        dirTargets.Add(subdir);
-                    more = dir.GetNext(&subdir);
+                    // folder name example: PHD2_CameraFrames_2026-05-06-142018
+                    int start = subdir.Find("CameraFrames_");
+                    if (start != wxNOT_FOUND)
+                    {
+                        wxString rslt = subdir.Mid(start + 13);
+                        if (rslt < oldestDateStr)
+                            dirTargets.Add(subdir);
+                        more = dir.GetNext(&subdir);
+                    }
                 }
                 dir.Close();
                 for (unsigned int i = 0; i < dirTargets.GetCount(); i++)