I'm sorry you had that experience Simon. I use the tool every day and certainly have been known to cancel a build. But I have never had it hang on me. Have you seen this more than once? Do other forum members have this happen?
It is really had to debug one-off hangs like this but we do want to know if it happens. Assuming I do not see a deluge of replies from other users who see the same issue, which would indicate a wide-spread issue, I would contact tech support if you have this happen again. It is likely a PC setup issue that needs to be troubleshot with a support engineer.
There is no problem if program is builder u can reproram or make correction and updation in your code the build it again and it will override the previous build and new ones is saved
Reprogram your board
Downed new or latest version of psoc creator