diff --git a/fbt.cmd b/fbt.cmd
index 078cc69a0..f83cdf14e 100644
--- a/fbt.cmd
+++ b/fbt.cmd
@@ -1,5 +1,5 @@
 @echo off
-call "%~dp0scripts\toolchain\fbtenv.cmd" env
+call "%~dp0scripts\toolchain\fbtenv.cmd" env || exit /b
 
 set SCONS_EP=python -m SCons
 
diff --git a/scripts/debug/41-udev.rules b/scripts/debug/41-flipper.rules
similarity index 72%
rename from scripts/debug/41-udev.rules
rename to scripts/debug/41-flipper.rules
index 6b4b37b92..8663e99ab 100644
--- a/scripts/debug/41-udev.rules
+++ b/scripts/debug/41-flipper.rules
@@ -1,10 +1,17 @@
-#Flipper Zero serial port
+# Flipper Zero serial port
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", ATTRS{manufacturer}=="Flipper Devices Inc.", TAG+="uaccess", GROUP="dialout"
-#Flipper Zero DFU
+
+# Flipper Zero DFU
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="df11", ATTRS{manufacturer}=="STMicroelectronics", TAG+="uaccess", GROUP="dialout"
-#Flipper ESP32s2 BlackMagic
+
+# Flipper ESP32s2 BlackMagic
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="303a", ATTRS{idProduct}=="40??", ATTRS{manufacturer}=="Flipper Devices Inc.", TAG+="uaccess", GROUP="dialout"
-#Flipper U2F
+
+# Flipper ESP32s2 in DAP mode
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="303a", ATTRS{idProduct}=="40??", ATTRS{manufacturer}=="CMSIS-DAP", TAG+="uaccess", GROUP="dialout"
+
+# Flipper U2F
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5741", ATTRS{manufacturer}=="Flipper Devices Inc.", ENV{ID_SECURITY_TOKEN}="1"
-#ST-Link-V3
+
+# ST-Link-V3
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="37??", ATTRS{manufacturer}=="STMicroelectronics", TAG+="uaccess", GROUP="dialout"
diff --git a/scripts/debug/README.md b/scripts/debug/README.md
new file mode 100644
index 000000000..59f2bf0c1
--- /dev/null
+++ b/scripts/debug/README.md
@@ -0,0 +1,19 @@
+## Installing udev rules
+
+On Linux, unprivileged users need to be in the `dialout` group to access serial ports and other USB devices. 
+
+To add your user to the `dialout` group, run the following command:
+
+```bash
+sudo usermod -a -G dialout $USER
+```
+
+To install the udev rules needed for debugging & CLI access to Flipper, run the following command:
+
+```bash
+sudo cp 41-flipper.rules /etc/udev/rules.d/
+sudo udevadm control --reload-rules
+sudo udevadm trigger
+```
+
+Note that not all possible debug interfaces are listed the `41-flipper.rules` file. If your interface is not supported out of the box, you may need to add a a rule for it. You can do so by adding a new line to the file according to udev rules syntax. Use `lsusb -v` to find the vendor and product IDs of your device.
\ No newline at end of file
diff --git a/scripts/toolchain/fbtenv.cmd b/scripts/toolchain/fbtenv.cmd
index 446f04aa7..893493313 100644
--- a/scripts/toolchain/fbtenv.cmd
+++ b/scripts/toolchain/fbtenv.cmd
@@ -13,7 +13,7 @@ if not ["%FBT_NOENV%"] == [""] (
     exit /b 0
 )
 
-set "FLIPPER_TOOLCHAIN_VERSION=28"
+set "FLIPPER_TOOLCHAIN_VERSION=31"
 
 if ["%FBT_TOOLCHAIN_PATH%"] == [""] (
     set "FBT_TOOLCHAIN_PATH=%FBT_ROOT%"
diff --git a/scripts/toolchain/fbtenv.sh b/scripts/toolchain/fbtenv.sh
index ef7549c87..4d6f9001b 100755
--- a/scripts/toolchain/fbtenv.sh
+++ b/scripts/toolchain/fbtenv.sh
@@ -4,7 +4,7 @@
 
 # public variables
 DEFAULT_SCRIPT_PATH="$(pwd -P)";
-FBT_TOOLCHAIN_VERSION="${FBT_TOOLCHAIN_VERSION:-"28"}";
+FBT_TOOLCHAIN_VERSION="${FBT_TOOLCHAIN_VERSION:-"31"}";
 
 if [ -z ${FBT_TOOLCHAIN_PATH+x} ] ; then
     FBT_TOOLCHAIN_PATH_WAS_SET=0;
@@ -208,7 +208,9 @@ fbtenv_show_unpack_percentage()
 fbtenv_unpack_toolchain()
 {
     echo "Unpacking toolchain to '$FBT_TOOLCHAIN_PATH/toolchain':";
-    rm $FBT_TOOLCHAIN_PATH/toolchain/current || true;
+    if [ -L "$FBT_TOOLCHAIN_PATH/toolchain/current" ]; then
+        rm "$FBT_TOOLCHAIN_PATH/toolchain/current";
+    fi
     tar -xvf "$FBT_TOOLCHAIN_PATH/toolchain/$TOOLCHAIN_TAR" -C "$FBT_TOOLCHAIN_PATH/toolchain" 2>&1 | fbtenv_show_unpack_percentage;
     mkdir -p "$FBT_TOOLCHAIN_PATH/toolchain" || return 1;
     mv "$FBT_TOOLCHAIN_PATH/toolchain/$TOOLCHAIN_DIR" "$TOOLCHAIN_ARCH_DIR" || return 1;
diff --git a/scripts/toolchain/windows-toolchain-download.ps1 b/scripts/toolchain/windows-toolchain-download.ps1
index 11d8a564d..025f8341f 100644
--- a/scripts/toolchain/windows-toolchain-download.ps1
+++ b/scripts/toolchain/windows-toolchain-download.ps1
@@ -13,19 +13,21 @@ $toolchain_zip = "$toolchain_dist_folder-$toolchain_version.zip"
 $toolchain_zip_temp_path = "$download_dir\$toolchain_zip"
 $toolchain_dist_temp_path = "$download_dir\$toolchain_dist_folder"
 
+try {
+
 if (Test-Path -LiteralPath "$toolchain_target_path") {
 	Write-Host -NoNewline "Removing old Windows toolchain.."
 	Remove-Item -LiteralPath "$toolchain_target_path" -Force -Recurse
 	Write-Host "done!"
 }
 
-if (Test-path -Path  "$toolchain_target_path\..\current") {
+if (Test-path -LiteralPath  "$toolchain_target_path\..\current") {
 	Write-Host -NoNewline "Unlinking 'current'.."
     Remove-Item -LiteralPath "$toolchain_target_path\..\current" -Force
 	Write-Host "done!"
 }
 
-if (!(Test-Path -Path "$toolchain_zip_temp_path" -PathType Leaf)) {
+if (!(Test-Path -LiteralPath "$toolchain_zip_temp_path" -PathType Leaf)) {
     Write-Host -NoNewline "Downloading Windows toolchain.."
     $wc = New-Object net.webclient
     $wc.Downloadfile("$toolchain_url", "$toolchain_zip_temp_path")
@@ -57,4 +59,10 @@ Write-Host -NoNewline "Cleaning up temporary files.."
 Remove-Item -LiteralPath "$toolchain_zip_temp_path" -Force
 Write-Host "done!"
 
-# dasdasd
+} catch {
+    Write-Host "An error occurred"
+    Write-Host $_
+    Write-Host "Please close VSCode and any other programs that may be using the toolchain and try again."
+    $host.SetShouldExit(1)
+    Exit 1
+}