https://github.com/epasveer/seer/pull/337

Index: src/SeerDebugDialog.cpp
--- src/SeerDebugDialog.cpp.orig
+++ src/SeerDebugDialog.cpp
@@ -431,7 +431,7 @@ void SeerDebugDialog::handleLoadBreakpointsFilenameToo
 
 void SeerDebugDialog::handleLoadCoreFilenameToolButton () {
 
-    QString name = QFileDialog::getOpenFileName(this, "Select a core file to debug.", coreFilename(), "Core Files (core core.*)", nullptr, QFileDialog::DontUseNativeDialog);
+    QString name = QFileDialog::getOpenFileName(this, "Select a core file to debug.", coreFilename(), "Core Files (core core.* *.core)", nullptr, QFileDialog::DontUseNativeDialog);
 
     if (name != "") {
         setCoreFilename(name);
