The official development of Launcher Pro stopped abruptly in 2012. The final official version released to the Google Play Store was . So, how did version "5.2.4" come to exist?
Stock Launcher Pro crashes on Android 4.4 KitKat due to changes in WebView and widget hosts. The "better patched" version backports a shim to catch ClassNotFoundException errors related to the old LauncherPro$WidgetDelegate .
Have a specific question about extracting the icons from Launcher Pro 5.2.4? Leave a comment below (comments are legacy, just like the launcher).
Even if a patched version works initially, it will never receive security updates. Android's framework changes constantly; a patched 2012 launcher may break on Android 10+ (scoped storage, gesture navigation, permissions).