diff --git a/tools/lammps-gui/TODO.md b/tools/lammps-gui/TODO.md
index bef30c1309..0ebb24eac1 100644
--- a/tools/lammps-gui/TODO.md
+++ b/tools/lammps-gui/TODO.md
@@ -4,6 +4,7 @@ LAMMPS-GUI TODO list:
 
 - figure out how widgets can be resized to fraction of available screen size.
 - figure out stacking order of frames and whether it can be more flexible
+- figure out how to avoid corrupted cached thermo data while reading it.
 - bundle LAMMPS tutorial input files
 
 - implement indenting regions for (nested) loops?
diff --git a/tools/lammps-gui/codeeditor.cpp b/tools/lammps-gui/codeeditor.cpp
index 36a811b92d..10d829d34c 100644
--- a/tools/lammps-gui/codeeditor.cpp
+++ b/tools/lammps-gui/codeeditor.cpp
@@ -14,6 +14,7 @@
 #include "codeeditor.h"
 #include "fileviewer.h"
 #include "lammpsgui.h"
+#include "lammpswrapper.h"
 #include "linenumberarea.h"
 
 #include <QAbstractItemView>
@@ -146,6 +147,7 @@ CodeEditor::CodeEditor(QWidget *parent) :
 {
     help_action = new QShortcut(QKeySequence::fromString("Ctrl+?"), parent);
     connect(help_action, &QShortcut::activated, this, &CodeEditor::get_help);
+    docver = "";
 
     // set up completer class (without a model currently)
 #define COMPLETER_SETUP(completer)                                                            \
@@ -1159,12 +1161,30 @@ void CodeEditor::insertCompletedCommand(const QString &completion)
     setTextCursor(cursor);
 }
 
+void CodeEditor::setDocver()
+{
+    LammpsWrapper *lammps = &qobject_cast<LammpsGui *>(parent())->lammps;
+    docver                = "/";
+    if (lammps) {
+        QString git_branch = (const char *)lammps->extract_global("git_branch");
+        if ((git_branch == "stable") || (git_branch == "maintenance")) {
+            docver = "/stable/";
+        } else if (git_branch == "release") {
+            docver = "/";
+        } else {
+            docver = "/latest/";
+        }
+    }
+}
+
 void CodeEditor::get_help()
 {
     QString page, help;
     find_help(page, help);
+    if (docver.isEmpty()) setDocver();
     if (!page.isEmpty())
-        QDesktopServices::openUrl(QUrl(QString("https://docs.lammps.org/%1").arg(page)));
+        QDesktopServices::openUrl(
+            QUrl(QString("https://docs.lammps.org%1%2").arg(docver).arg(page)));
 }
 
 void CodeEditor::find_help(QString &page, QString &help)
@@ -1215,8 +1235,9 @@ void CodeEditor::find_help(QString &page, QString &help)
 void CodeEditor::open_help()
 {
     auto *act = qobject_cast<QAction *>(sender());
+    if (docver.isEmpty()) setDocver();
     QDesktopServices::openUrl(
-        QUrl(QString("https://docs.lammps.org/%1").arg(act->data().toString())));
+        QUrl(QString("https://docs.lammps.org%1%2").arg(docver).arg(act->data().toString())));
 }
 
 void CodeEditor::open_url()
diff --git a/tools/lammps-gui/codeeditor.h b/tools/lammps-gui/codeeditor.h
index 873b13e302..17236e3252 100644
--- a/tools/lammps-gui/codeeditor.h
+++ b/tools/lammps-gui/codeeditor.h
@@ -79,6 +79,7 @@ protected:
     void dropEvent(QDropEvent *event) override;
     void contextMenuEvent(QContextMenuEvent *event) override;
     void keyPressEvent(QKeyEvent *event) override;
+    void setDocver();
 
 private slots:
     void updateLineNumberAreaWidth(int newBlockCount);
@@ -107,6 +108,7 @@ private:
     int highlight;
     bool reformat_on_return;
     bool automatic_completion;
+    QString docver;
 
     QMap<QString, QString> cmd_map;
     QMap<QString, QString> fix_map;
diff --git a/tools/lammps-gui/lammpsgui.cpp b/tools/lammps-gui/lammpsgui.cpp
index 1d29e60222..0eb24b81f7 100644
--- a/tools/lammps-gui/lammpsgui.cpp
+++ b/tools/lammps-gui/lammpsgui.cpp
@@ -75,6 +75,7 @@ LammpsGui::LammpsGui(QWidget *parent, const char *filename) :
     qRegisterMetaTypeStreamOperators<QList<QString>>("QList<QString>");
 #endif
 
+    docver = "";
     ui->setupUi(this);
     this->setCentralWidget(ui->textEdit);
     highlighter = new Highlighter(ui->textEdit->document());
@@ -1218,6 +1219,18 @@ void LammpsGui::view_variables()
     }
 }
 
+void LammpsGui::setDocver()
+{
+    QString git_branch = (const char *)lammps.extract_global("git_branch");
+    if ((git_branch == "stable") || (git_branch == "maintenance")) {
+        docver = "/stable/";
+    } else if (git_branch == "release") {
+        docver = "/";
+    } else {
+        docver = "/latest/";
+    }
+}
+
 void LammpsGui::about()
 {
     std::string version = "This is LAMMPS-GUI version " LAMMPS_GUI_VERSION;
@@ -1329,7 +1342,8 @@ void LammpsGui::help()
 
 void LammpsGui::manual()
 {
-    QDesktopServices::openUrl(QUrl("https://docs.lammps.org/"));
+    if (docver.isEmpty()) setDocver();
+    QDesktopServices::openUrl(QUrl(QString("https://docs.lammps.org%1").arg(docver)));
 }
 
 void LammpsGui::tutorial()
@@ -1339,7 +1353,9 @@ void LammpsGui::tutorial()
 
 void LammpsGui::howto()
 {
-    QDesktopServices::openUrl(QUrl("https://docs.lammps.org/Howto_lammps_gui.html"));
+    if (docver.isEmpty()) setDocver();
+    QDesktopServices::openUrl(
+        QUrl(QString("https://docs.lammps.org%1Howto_lammps_gui.html").arg(docver)));
 }
 
 void LammpsGui::defaults()
diff --git a/tools/lammps-gui/lammpsgui.h b/tools/lammps-gui/lammpsgui.h
index 29372efc1c..77f0e60366 100644
--- a/tools/lammps-gui/lammpsgui.h
+++ b/tools/lammps-gui/lammpsgui.h
@@ -69,6 +69,7 @@ protected:
     void do_run(bool use_buffer);
     void start_lammps();
     void run_done();
+    void setDocver();
 
 public slots:
     void quit();
@@ -132,6 +133,7 @@ private:
 
     LammpsWrapper lammps;
     LammpsRunner *runner;
+    QString docver;
     std::string plugin_path;
     bool is_running;
     int run_counter;