So, this is the 3rd time I've reinstalled Aptana Studio 3 (3.4.2 this time). I am working on a web project with .php, .js, .css, .html and a few other file types. After several weeks of successful work, Aptana will hang on startup. It will load my project and files, but then all I get is a beach ball and aside from moving the main window, I can't do anything (menu clicks, file close, nada). This state will then persist no matter how many restarts I do. The only solution is to send Applications/AptanaStudio to the trash and download a fresh copy. Then, it doesn't remember my old project and starts ok. Could be just a coincidence but twice now when this happened I was editing .js files. Anyone else having problems with this?
My old answer didn't really work.. What really helped:
(on windows) in this folder:
[my workspace folder]\.metadata\.plugins\org.eclipse.core.resources\.projects\[my project(s)]\
delete the .markers file (I think this are breakpoints set)