diff --git a/README.md b/README.md
index a0aa976..511eb56 100644
--- a/README.md
+++ b/README.md
@@ -53,17 +53,52 @@ Example of working without the user interface, please see the RSWAT vignettes:
vignette("SUFI2_without_GUI",package="RSWAT")
```
+# Quick demo (streamflow calibration with SWAT)
-## Citing RSWAT
+```R
+# Call RSWAT graphical user interface: DO NOT use RSWAT:showRSWAT()
+library(RSWAT)
-**Nguyen, T. V.**, Dietrich, J., Dang, D. T., Tran, D. A., Doan, B. V., Sarrazin, F. J., Abbaspour, K., Srinivasan, R. (2022). An interactive graphical interface tool for parameter calibration, sensitivity analysis, uncertainty analysis, and visualization for the Soil and Water Assessment Tool. Environmental Modelling & Software, 156, 105497. https://doi.org/10.1016/j.envsoft.2022.105497.
+# Extract example data (TODO: replace C:/example with your folder)
+extracExampleData(exampleData, "all", "C:/example")
-**Nguyen, T. V.** (2024). RSWAT: An R package for the Soil and Water Assessment Tool models. Submitted to The Journal of Open Source Software.
+# We still need SWAT executable for this demo
+# which can be downloaded from https://swat.tamu.edu/software/swat-executables/
-# GUI of RSWAT
+# Now show the interface and run with example data (detail of each step are shown below)
+showRSWAT()
+```
(NOTE: in the latest version, the user interface could be slightly difference)
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+## Citing RSWAT
+
+**Nguyen, T. V.**, Dietrich, J., Dang, D. T., Tran, D. A., Doan, B. V., Sarrazin, F. J., Abbaspour, K., Srinivasan, R. (2022). An interactive graphical interface tool for parameter calibration, sensitivity analysis, uncertainty analysis, and visualization for the Soil and Water Assessment Tool. Environmental Modelling & Software, 156, 105497. https://doi.org/10.1016/j.envsoft.2022.105497.
+
+**Nguyen, T. V.** (2024). RSWAT: An R package for the Soil and Water Assessment Tool models. Submitted to The Journal of Open Source Software.
\ No newline at end of file
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diff --git a/inst/R-SWAT/ui.R b/inst/R-SWAT/ui.R
index a4bd703..02e7387 100644
--- a/inst/R-SWAT/ui.R
+++ b/inst/R-SWAT/ui.R
@@ -7,7 +7,7 @@ ui <- shinydashboard::dashboardPage(
# ----------------------------------------------------------------------Header
shinydashboard::dashboardHeader(
# Name of the app
- title = "RSWAT (v1.0)",
+ title = "RSWAT (v4.0)",
# Add two buttons in the header for saving and loading project
tags$li(class = "dropdown",