diff --git a/apps/launcher/datafilespage.cpp b/apps/launcher/datafilespage.cpp
index f5c0694a3b..9f92e8ed0f 100644
--- a/apps/launcher/datafilespage.cpp
+++ b/apps/launcher/datafilespage.cpp
@@ -1001,7 +1001,11 @@ bool Launcher::DataFilesPage::showDeleteMessageBox(const QString& text)
 
 void Launcher::DataFilesPage::slotAddonDataChanged()
 {
-    QStringList selectedFiles = selectedFilePaths();
+    const ContentSelectorModel::ContentFileList items = mSelector->selectedFiles();
+    QStringList selectedFiles;
+    for (const ContentSelectorModel::EsmFile* item : items)
+        selectedFiles.append(item->filePath());
+
     if (mSelectedFiles != selectedFiles)
     {
         const std::lock_guard lock(mReloadCellsMutex);
@@ -1013,6 +1017,7 @@ void Launcher::DataFilesPage::slotAddonDataChanged()
 
 void Launcher::DataFilesPage::reloadCells()
 {
+    QStringList selectedFiles;
     std::unique_lock lock(mReloadCellsMutex);
 
     while (true)
@@ -1025,16 +1030,26 @@ void Launcher::DataFilesPage::reloadCells()
         if (!std::exchange(mReloadCells, false))
             continue;
 
-        QStringList selectedFiles = mSelectedFiles;
+        const QStringList newSelectedFiles = mSelectedFiles;
 
         lock.unlock();
 
-        CellNameLoader cellNameLoader;
-        QSet<QString> set = cellNameLoader.getCellNames(selectedFiles);
-        QStringList cellNamesList(set.begin(), set.end());
-        std::sort(cellNamesList.begin(), cellNamesList.end());
+        QStringList filteredFiles;
+        for (const QString& v : newSelectedFiles)
+            if (QFile::exists(v))
+                filteredFiles.append(v);
 
-        emit signalLoadedCellsChanged(std::move(cellNamesList));
+        if (selectedFiles != filteredFiles)
+        {
+            selectedFiles = std::move(filteredFiles);
+
+            CellNameLoader cellNameLoader;
+            QSet<QString> set = cellNameLoader.getCellNames(selectedFiles);
+            QStringList cellNamesList(set.begin(), set.end());
+            std::sort(cellNamesList.begin(), cellNamesList.end());
+
+            emit signalLoadedCellsChanged(std::move(cellNamesList));
+        }
 
         lock.lock();
 
diff --git a/components/contentselector/model/contentmodel.cpp b/components/contentselector/model/contentmodel.cpp
index 30bfeffe6e..d5202edc44 100644
--- a/components/contentselector/model/contentmodel.cpp
+++ b/components/contentselector/model/contentmodel.cpp
@@ -13,6 +13,7 @@
 #include <QDirIterator>
 #include <QFont>
 #include <QIODevice>
+#include <QProgressDialog>
 
 #include <components/esm/format.hpp>
 #include <components/esm3/esmreader.hpp>
@@ -696,10 +697,14 @@ bool ContentSelectorModel::ContentModel::isLoadOrderError(const EsmFile* file) c
 
 void ContentSelectorModel::ContentModel::setContentList(const QStringList& fileList)
 {
+    QProgressDialog progressDialog("Setting content list", {}, 0, static_cast<int>(fileList.size()));
+    progressDialog.setWindowModality(Qt::WindowModal);
+    progressDialog.setValue(0);
+
     int previousPosition = -1;
-    for (const QString& filepath : fileList)
+    for (qsizetype i = 0, n = fileList.size(); i < n; ++i)
     {
-        const EsmFile* file = item(filepath);
+        const EsmFile* file = item(fileList[i]);
         if (setCheckState(file, true))
         {
             // setCheckState already gracefully handles builtIn and fromAnotherConfigFile
@@ -714,7 +719,10 @@ void ContentSelectorModel::ContentModel::setContentList(const QStringList& fileL
                 previousPosition = filePosition;
             }
         }
+
+        progressDialog.setValue(static_cast<int>(i + 1));
     }
+
     refreshModel();
 }
 
diff --git a/components/contentselector/view/contentselector.cpp b/components/contentselector/view/contentselector.cpp
index 42851e1e21..f8374b5db5 100644
--- a/components/contentselector/view/contentselector.cpp
+++ b/components/contentselector/view/contentselector.cpp
@@ -7,6 +7,7 @@
 #include <QClipboard>
 #include <QMenu>
 #include <QModelIndex>
+#include <QProgressDialog>
 #include <QSortFilterProxyModel>
 
 ContentSelectorView::ContentSelector::ContentSelector(QWidget* parent, bool showOMWScripts)
@@ -292,27 +293,33 @@ void ContentSelectorView::ContentSelector::slotShowContextMenu(const QPoint& pos
     mContextMenu->exec(globalPos);
 }
 
-void ContentSelectorView::ContentSelector::setCheckStateForMultiSelectedItems(bool checked)
+void ContentSelectorView::ContentSelector::setCheckStateForMultiSelectedItems(Qt::CheckState checkState)
 {
-    Qt::CheckState checkState = checked ? Qt::Checked : Qt::Unchecked;
-    for (const QModelIndex& index : ui->addonView->selectionModel()->selectedIndexes())
+    const QModelIndexList selectedIndexes = ui->addonView->selectionModel()->selectedIndexes();
+
+    QProgressDialog progressDialog("Updating content selection", {}, 0, static_cast<int>(selectedIndexes.size()));
+    progressDialog.setWindowModality(Qt::WindowModal);
+    progressDialog.setValue(0);
+
+    for (qsizetype i = 0, n = selectedIndexes.size(); i < n; ++i)
     {
-        QModelIndex sourceIndex = mAddonProxyModel->mapToSource(index);
+        const QModelIndex sourceIndex = mAddonProxyModel->mapToSource(selectedIndexes[i]);
+
         if (mContentModel->data(sourceIndex, Qt::CheckStateRole).toInt() != checkState)
-        {
             mContentModel->setData(sourceIndex, checkState, Qt::CheckStateRole);
-        }
+
+        progressDialog.setValue(static_cast<int>(i + 1));
     }
 }
 
 void ContentSelectorView::ContentSelector::slotUncheckMultiSelectedItems()
 {
-    setCheckStateForMultiSelectedItems(false);
+    setCheckStateForMultiSelectedItems(Qt::Unchecked);
 }
 
 void ContentSelectorView::ContentSelector::slotCheckMultiSelectedItems()
 {
-    setCheckStateForMultiSelectedItems(true);
+    setCheckStateForMultiSelectedItems(Qt::Checked);
 }
 
 void ContentSelectorView::ContentSelector::slotCopySelectedItemsPaths()
diff --git a/components/contentselector/view/contentselector.hpp b/components/contentselector/view/contentselector.hpp
index 2fdd38c799..fde2d063c1 100644
--- a/components/contentselector/view/contentselector.hpp
+++ b/components/contentselector/view/contentselector.hpp
@@ -69,7 +69,7 @@ namespace ContentSelectorView
         void buildAddonView();
         void buildContextMenu();
         void setGameFileSelected(int index, bool selected);
-        void setCheckStateForMultiSelectedItems(bool checked);
+        void setCheckStateForMultiSelectedItems(Qt::CheckState checkState);
 
     signals:
         void signalCurrentGamefileIndexChanged(int);