Before installing 5.4 on my Lenovo P52 / Windows 10 machine, PL ran just fine. With 5.4 however, PL reacted painfully slow as soon as I started to use local adjustments.
I then uninstalled 5.4, went back to 5.3.1 (which worked perfectly fine) - but the behaviour was the same with 5.4 - the app crashes as soon as I hit the “Local adjustmens” button.
I have had the same experience, PL5.4 is very slow, especially for local edits. But no crashes!!
I am using WIN 11 Pro with a Ryzen 9 5900X and 64GB RAM.