Explain how to install an older version of ABP Studio

docs/en/studio/installation.md

@@ -65,3 +65,11 @@ When you see the "New Version Available" window, follow these steps to upgrade A
 2. A progress indicator will display the download status.
 3. Once the download is complete, a new modal will appear with the "Install and Relaunch" buttons.
 4. Click on the "Install and Relaunch" button to complete the installation process.
+
+## Installing a Specific Version
+
+If you want to install an older version of ABP Studio, you can download [Abp Studio Version Switcher](https://github.com/abpframework/abp/tree/dev/tools/abp-studio-version-switcher/abp-studio-version-switcher.ps1) script and run it as shown below;
+
+```bash
+./switch-abp-studio-version.ps1 2.0.0
+```

tools/abp-studio-version-switcher/switch-abp-studio-version.ps1

@@ -0,0 +1,33 @@
+param (
+    [string]$version = "0.7.6",
+    [string]$channel = "beta"
+)
+$installdir = "$env:LOCALAPPDATA\abp-studio\"
+
+Write-Host "----------------------------------------"
+Write-Host "Switching to ABP Studio version $version on channel $channel..."
+Write-Host "----------------------------------------"
+Write-Host "Installing to $installdir"
+
+
+$url = "https://abp.io/api/abp-studio/download/r/windows/abp-studio-$version-$channel-full.nupkg"
+$output = "abp-studio-$version-$channel-full.nupkg"
+
+$outputPath = "$installdir\packages\$output"
+
+if (Test-Path $outputPath) {
+    Write-Host "File $output already exists. Skipping download."
+} else {
+    Write-Host "Downloading $url to $outputPath"
+    Invoke-WebRequest -Uri $url -OutFile $outputPath
+}
+Write-Host "----------------------------------------"
+
+$installdirUpdate = "$installdir\Update.exe"
+
+Write-Host "Running $installdirUpdate apply --package $outputPath"
+Invoke-Expression "$installdirUpdate apply --package $outputPath"
+
+Write-Host "----------------------------------------"
+Write-Host "ABP Studio version $version on channel $channel installed successfully."
+Write-Host "----------------------------------------"