diff --git a/Installation-and-Upgrade.md b/Installation-and-Upgrade.md
index e43d4e3..f667b35 100644
--- a/Installation-and-Upgrade.md
+++ b/Installation-and-Upgrade.md
@@ -17,7 +17,8 @@ Pick the correct folder for your device, and copy it to **aurei** folder.
 ## Upgrading to 5.1.1 from 4.3 or older
 
 1. Follow the Installation section on this page
-1. Remove anything other than "payloads" folder in **aurei/**
+1. (Optional) If you're upgrading from 3.9 or older, move the contents of `SD:/rei/` to `SD:/aurei/`
+1. Remove anything other than "payloads" folder in `SD:/aurei/`
 1. (Optional) Rename your `<button>.bin` to `<button>_<name>.bin`, **make sure it's not longer than 13 characters including the ".bin"**. (e.g. y_uncart.bin)
 1. (Optional) Rename your `default.bin` to `def_<payloadname>.bin`, **make sure it's not longer than 13 characters including the ".bin"**. (e.g. def_d9.bin)
 1. Boot.