diff --git a/UpdatePTUDevCtrl/update.h b/UpdatePTUDevCtrl/update.h
index 3b7db72..b70c02a 100644
--- a/UpdatePTUDevCtrl/update.h
+++ b/UpdatePTUDevCtrl/update.h
@@ -8,6 +8,7 @@
 #include <QByteArray>
 #include <QProcess>
 #include <QPluginLoader>
+#include <QMap>
 
 #include <DeviceController/interfaces.h>
 
@@ -60,6 +61,47 @@ public:
     bool doUpdate(int &displayIndex, QStringList const &linesToWorkOn);
     bool checkDownloadedJsonVersions(QStringList const& jsonFileNames);
 
+    QMap<QString, QString>
+        getInstalledJsonVersions(QStringList const& jsonFileNames =
+                            QStringList(
+                                QList(
+                                    std::initializer_list<QString>{
+                                        QString("etc/psa_config/DC2C_conf.json"),
+                                        QString("etc/psa_config/DC2C_cash.json"),
+                                        QString("etc/psa_config/DC2C_device.json"),
+                                        QString("etc/psa_config/DC2C_print01.json"),
+                                        QString("etc/psa_config/DC2C_print02.json"),
+                                        QString("etc/psa_config/DC2C_print03.json"),
+                                        QString("etc/psa_config/DC2C_print04.json"),
+                                        QString("etc/psa_config/DC2C_print05.json"),
+                                        QString("etc/psa_config/DC2C_print06.json"),
+                                        QString("etc/psa_config/DC2C_print07.json"),
+                                        QString("etc/psa_config/DC2C_print08.json"),
+                                        QString("etc/psa_config/DC2C_print09.json"),
+                                        QString("etc/psa_config/DC2C_print10.json"),
+                                        QString("etc/psa_config/DC2C_print11.json"),
+                                        QString("etc/psa_config/DC2C_print12.json"),
+                                        QString("etc/psa_config/DC2C_print13.json"),
+                                        QString("etc/psa_config/DC2C_print14.json"),
+                                        QString("etc/psa_config/DC2C_print15.json"),
+                                        QString("etc/psa_config/DC2C_print16.json"),
+                                        QString("etc/psa_config/DC2C_print17.json"),
+                                        QString("etc/psa_config/DC2C_print18.json"),
+                                        QString("etc/psa_config/DC2C_print19.json"),
+                                        QString("etc/psa_config/DC2C_print20.json"),
+                                        QString("etc/psa_config/DC2C_print21.json"),
+                                        QString("etc/psa_config/DC2C_print22.json"),
+                                        QString("etc/psa_config/DC2C_print23.json"),
+                                        QString("etc/psa_config/DC2C_print24.json"),
+                                        QString("etc/psa_config/DC2C_print25.json"),
+                                        QString("etc/psa_config/DC2C_print26.json"),
+                                        QString("etc/psa_config/DC2C_print27.json"),
+                                        QString("etc/psa_config/DC2C_print28.json"),
+                                        QString("etc/psa_config/DC2C_print29.json"),
+                                        QString("etc/psa_config/DC2C_print30.json"),
+                                        QString("etc/psa_config/DC2C_print31.json"),
+                                        QString("etc/psa_config/DC2C_print32.json")})));
+
     hwinf *hw() { return m_hw; }
     hwinf const *hw() const { return m_hw; }