also use 3.5.4 on win10
and now test p5.js mode, load a example, works fine here.
but i did NOT have to ?UPDATE? mode, here still
p5.js Mode 1.2.2 Fathom Information Design Adds a simple editor for p5.js code
anyhow when i try first time to run i got the windows defender java question
what is actually strange as i use PDE 3.5.4 in JAVA mode a week already?