update qmake file

sources/aboutbox.cpp

@@ -11,6 +11,8 @@ AboutBox::AboutBox(QWidget *parent) :
     xmin = ui->frame->x();
     ymax = ui->frame->x() + ui->frame->height();
     ymin = ui->frame->y();
+    ui->systemLabel->setText(QString("Built on %1 (%2-%3)").arg(QSysInfo::prettyProductName(), QSysInfo::kernelVersion(), QSysInfo::buildCpuArchitecture()));
+    ui->versionLabel->setText(QString("Version: %1").arg(VERSION));
 }
 
 AboutBox::~AboutBox()

sources/aboutbox.h

@@ -1,9 +1,12 @@
 #ifndef ABOUTBOX_H
 #define ABOUTBOX_H
 
+#define VERSION "2.0.0"
+
 #include <QDialog>
 #include <QMouseEvent>
 #include <iostream>
+#include <QSysInfo>
 
 namespace Ui {
 class AboutBox;

sources/mainwindow.cpp

@@ -104,6 +104,10 @@ void MainWindow::open_save() {
     delete file;
 
     QJsonObject obj = QJsonDocument::fromJson(json.toUtf8()).object();
+    if (obj[KEY_SAVE_FILE_VERSION] != SAVE_FILE_VERSION) {
+        panic_dialog("Your save file version does not match the supported version."
+                     " Please update this file and restart the application");
+    }
     week_template = Week::from_json(obj[KEY_TEMPLATE].toObject());
     QJsonArray arr = obj[KEY_YEARS].toArray();
     foreach (QJsonValue val, arr) {