diff --git a/CMakeLists.txt b/CMakeLists.txt
index 57f98d9..d74482a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.10)
 
-project(kima2 VERSION 1.7.2)
+project(kima2 VERSION 1.8.0)
 
 set(CMAKE_MODULE_PATH "${CMAKE_HOME_DIRECTORY}/cmake")
 
diff --git a/de.rustysoft.kima2.metainfo.xml.in b/de.rustysoft.kima2.metainfo.xml.in
index d70963a..9f228f7 100644
--- a/de.rustysoft.kima2.metainfo.xml.in
+++ b/de.rustysoft.kima2.metainfo.xml.in
@@ -9,12 +9,12 @@
   <project_license>GPL-3.0-or-later</project_license>
 
   <releases>
-    <release version="@PROJECT_VERSION@" type="stable" date="2023-04-25" />
+    <release version="@PROJECT_VERSION@" type="stable" date="2024-01-23" />
   </releases>
   
   <description>
     <p>
-      A small cash point program for children’s stuff markets. German language only.
+      A small cash point program for children's stuff markets. German language only.
     </p>
   </description>
   
diff --git a/meson.build b/meson.build
index a0f8b23..0f06586 100644
--- a/meson.build
+++ b/meson.build
@@ -1,4 +1,4 @@
-project('kima2', 'cpp', default_options : ['cpp_std=c++20'], version : '1.6.1')
+project('kima2', 'cpp', default_options : ['cpp_std=c++20'], version : '1.8.0')
 
 conf_data = configuration_data()
 conf_data.set('PROJECT_VERSION', '"' + meson.project_version() + '"')
diff --git a/src/core/jsonutil.cpp b/src/core/jsonutil.cpp
index bd24b4e..095a7b0 100644
--- a/src/core/jsonutil.cpp
+++ b/src/core/jsonutil.cpp
@@ -102,8 +102,10 @@ void JsonUtil::importSales(const std::filesystem::path &filePath, Marketplace *m
 
     int source_no = jsonValues["source_no"];
     if (source_no == cashPointNo) {
-        throw std::runtime_error("Die Kassen-Nr. der zu imporierenden Daten wird von dieser Kasse "
-                                 "hier bereits verwendet.");
+        std::string ret = "Die Kassen-Nr. ";
+        ret += std::to_string(source_no);
+        ret += " der zu imporierenden Daten wird von dieser Kasse hier bereits verwendet.";
+        throw std::runtime_error(ret);
     }
 
     market->setSalesToDelete(jsonValues["source_no"]);
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index d61a95e..a94b7f1 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -504,27 +504,30 @@ void MainWindow::onImportSalesJsonActionTriggered()
 {
     QSettings settings;
 
-    auto filename = QFileDialog::getOpenFileName(this, "Umsätze/Transaktionen importieren",
+    auto filenames = QFileDialog::getOpenFileNames(this, "Umsätze/Transaktionen importieren",
                                                  QString(), "JSON Dateien (*.json)");
 
-    if (filename.isEmpty())
+    if (filenames.isEmpty())
         return;
 
+    for(auto filename: filenames) {
 #if defined(_WIN64) || defined(_WIN32)
-    fs::path filePath(filename.toStdWString());
+        fs::path filePath(filename.toStdWString());
 #else
-    fs::path filePath(filename.toStdString());
+        fs::path filePath(filename.toStdString());
 #endif
 
-    delete m_ui.salesView->model();
-    try {
-        JsonUtil::importSales(filePath, m_marketplace.get(),
-                              settings.value("global/cashPointNo").toInt());
-    } catch (std::runtime_error &err) {
-        QMessageBox(QMessageBox::Icon::Warning, "Import nicht möglich", err.what(), QMessageBox::Ok,
-                    this)
-            .exec();
+        delete m_ui.salesView->model();
+        try {
+            JsonUtil::importSales(filePath, m_marketplace.get(),
+                                settings.value("global/cashPointNo").toInt());
+        } catch (std::runtime_error &err) {
+            QMessageBox(QMessageBox::Icon::Warning, "Import nicht möglich", err.what(), QMessageBox::Ok,
+                        this)
+                .exec();
+        }
     }
+
     setSaleModel();
     updateStatLabel();
 }