All blur values have been moved to decoration:blur:

rockethype/config/hypr/hyprland.conf

@@ -52,6 +52,7 @@ exec-once=waybar
 exec-once=swaync
 exec-once=[workspace 4 silent;noanim] discord
 exec-once=transmission-daemon
+exec-once=thunar --daemon
 exec-once=steam-native -silent
 # Styling
 general {
@@ -68,10 +69,10 @@ general {
 
 decoration {
     rounding = 4
-    blur = yes
-    blur_size = 3
-    blur_passes = 1
-    blur_new_optimizations = on
+    decoration:blur: yes
+    decoration:blur_size: 3
+    decoration:blur_passes: 1
+    decoration:blur_new_optimizations: on
 
     drop_shadow = yes
     shadow_range = 4