diff --git a/NEWS.md b/NEWS.md
index 9c9b3a67..cf66f53e 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,9 @@
+Red Panda C++ Version 1.1.5
+
+  - change: uncheck "hide unsupported files" in files view shouldn't gray out non-c files
+  - enhancement: double clicking a non-text file in the files view, will open it with external program
+  - enhancement: double clicking a non-text file in the project's view, will open it with external program
+
 Red Panda C++ Version 1.1.4
 
   - enhancement: prohibit move selection up/down under column mode
diff --git a/RedPandaIDE/editor.h b/RedPandaIDE/editor.h
index c4493fa5..1137130f 100644
--- a/RedPandaIDE/editor.h
+++ b/RedPandaIDE/editor.h
@@ -147,13 +147,14 @@ public:
     const QByteArray& encodingOption() const noexcept;
     void setEncodingOption(const QByteArray& encoding) noexcept;
     const QByteArray& fileEncoding() const noexcept;
+    void convertToEncoding(const QByteArray& encoding);
     const QString& filename() const noexcept;
+
     bool inProject() const noexcept;
     bool isNew() const noexcept;
 
     void loadFile(QString filename = "");
     void saveFile(QString filename);
-    void convertToEncoding(const QByteArray& encoding);
     bool save(bool force=false, bool reparse=true);
     bool saveAs(const QString& name="", bool fromProject = false);
     void activate();
@@ -164,9 +165,11 @@ public:
     void updateCaption(const QString& newCaption=QString());
     void applySettings();
     void applyColorScheme(const QString& schemeName);
+
     void copyToClipboard() override;
     void cutToClipboard() override;
     void copyAsHTML();
+
     void setCaretPosition(int line,int aChar);
     void setCaretPositionAndActivate(int line,int aChar);
 
diff --git a/RedPandaIDE/mainwindow.cpp b/RedPandaIDE/mainwindow.cpp
index 805e0b10..13f4f9c8 100644
--- a/RedPandaIDE/mainwindow.cpp
+++ b/RedPandaIDE/mainwindow.cpp
@@ -83,6 +83,8 @@
 #include "widgets/searchdialog.h"
 
 #ifdef Q_OS_WIN
+#include <QMimeDatabase>
+#include <QMimeType>
 #include <windows.h>
 #endif
 
@@ -304,7 +306,7 @@ MainWindow::MainWindow(QWidget *parent)
     mFileSystemModel.setIconProvider(&mFileSystemModelIconProvider);
 
     mFileSystemModel.setNameFilters(pSystemConsts->defaultFileNameFilters());
-    mFileSystemModel.setNameFilterDisables(false);
+    mFileSystemModel.setNameFilterDisables(true);
     //setFilesViewRoot(pSettings->environment().currentFolder());
     for (int i=1;i<mFileSystemModel.columnCount();i++) {
         ui->treeFiles->hideColumn(i);
@@ -6903,9 +6905,22 @@ void MainWindow::on_treeFiles_doubleClicked(const QModelIndex &index)
     QString filepath = mFileSystemModel.filePath(index);
     QFileInfo file(filepath);
     if (file.isFile()) {
-        if (getFileType(filepath)==FileType::Project) {
+        switch (getFileType(filepath)) {
+        case FileType::Project:
             openProject(filepath);
-        } else {
+            break;
+        case FileType::Other:
+            {
+            QMimeDatabase db;
+            QMimeType mimeType=db.mimeTypeForFile(file);
+            if (mimeType.isValid() && mimeType.name().startsWith("text/")) {
+                openFile(filepath);
+            } else {
+                QDesktopServices::openUrl(QUrl::fromLocalFile(file.absoluteFilePath()));
+            }
+        }
+            break;
+        default:
             openFile(filepath);
         }
     }
@@ -7772,6 +7787,11 @@ void MainWindow::on_actionGit_Push_triggered()
 void MainWindow::on_actionFilesView_Hide_Non_Support_Files_toggled(bool /* arg1 */)
 {
     mFileSystemModel.setNameFilterDisables(!ui->actionFilesView_Hide_Non_Support_Files->isChecked());
+    if (!mFileSystemModel.nameFilterDisables()) {
+        mFileSystemModel.setNameFilters(pSystemConsts->defaultFileNameFilters());
+    } else {
+        mFileSystemModel.setNameFilters(QStringList());
+    }
     if (pSettings->environment().hideNonSupportFilesInFileView()
             != ui->actionFilesView_Hide_Non_Support_Files->isChecked()) {
         pSettings->environment().setHideNonSupportFilesInFileView(ui->actionFilesView_Hide_Non_Support_Files->isChecked());
diff --git a/RedPandaIDE/project.cpp b/RedPandaIDE/project.cpp
index 2e56f252..ab31dd16 100644
--- a/RedPandaIDE/project.cpp
+++ b/RedPandaIDE/project.cpp
@@ -34,6 +34,8 @@
 #include <QTextCodec>
 #include <QMessageBox>
 #include <QDirIterator>
+#include <QMimeDatabase>
+#include <QDesktopServices>
 #include "customfileiconprovider.h"
 #include <QMimeData>
 #include "settings.h"
@@ -315,6 +317,15 @@ Editor *Project::openUnit(int index)
     PProjectUnit unit = mUnits[index];
 
     if (!unit->fileName().isEmpty() && fileExists(unit->fileName())) {
+        if (getFileType(unit->fileName())==FileType::Other) {
+            QMimeDatabase db;
+            QMimeType mimeType=db.mimeTypeForFile(unit->fileName());
+            if (!mimeType.isValid() || !mimeType.name().startsWith("text/")) {
+                QDesktopServices::openUrl(QUrl::fromLocalFile(unit->fileName()));
+            }
+            return nullptr;
+        }
+
         Editor * editor = mEditorList->getOpenedEditorByFilename(unit->fileName());
         if (editor) {//already opened in the editors
             editor->setInProject(true);
diff --git a/RedPandaIDE/utils.cpp b/RedPandaIDE/utils.cpp
index 1259458d..04ffe52f 100644
--- a/RedPandaIDE/utils.cpp
+++ b/RedPandaIDE/utils.cpp
@@ -263,6 +263,18 @@ FileType getFileType(const QString &filename)
     if (filename.endsWith(".rc",PATH_SENSITIVITY)) {
         return FileType::WindowsResourceSource;
     }
+    if (filename.endsWith(".in",PATH_SENSITIVITY)) {
+        return FileType::Text;
+    }
+    if (filename.endsWith(".out",PATH_SENSITIVITY)) {
+        return FileType::Text;
+    }
+    if (filename.endsWith(".txt",PATH_SENSITIVITY)) {
+        return FileType::Text;
+    }
+    if (filename.endsWith(".dat",PATH_SENSITIVITY)) {
+        return FileType::Text;
+    }
     return FileType::Other;
 }
 
diff --git a/RedPandaIDE/utils.h b/RedPandaIDE/utils.h
index cbe971af..684d267f 100644
--- a/RedPandaIDE/utils.h
+++ b/RedPandaIDE/utils.h
@@ -47,6 +47,7 @@ enum class FileType{
     CppHeader, // c++ header (.hpp)
     WindowsResourceSource, // resource source (.res)
     Project, //Red Panda C++ Project (.dev)
+    Text, // text file
     Other // any others
 };