When I update Aptana it gets so far then a "Problem occured" modal box pops up (screen grab attached). I click retry and after a few minutes the pop up appears again. I have uninstalled and reinstalled to no avail.
Interestingly , it really frags my whole network connection.
Updating works as an eclipse plug-in.
http://support.aptana.com/asap/browse/STU-392