I have established several connections in Aptana Studio as FTP links, I have two connections usually for each site/project, one points to the Live source location and another to a test source location.
When working on a project I initially want to upload changes I make to the test environment, when I am happy I then want to upload the changed files to the live environment.
However I can't seem to switch connections easily in the project, the only way so far I have managed is to delete the connection and reconnect (to the environment I now want to FTP to). This requires re-entering the FTP configuration details, it's not a big job but I'd rather just be able to point the project at different connections when I want to use them, am I missing something obvious?
Window > Show View > Project Explorer
Right click on your project > Publish > Connections > Connection Manager
Create whatever connections you need.
Now when you go to upload or sync, you will be offered a choice for which connection you want to use. You can also choose to make one of the connections the default so that you won't be prompted while you are working on your staging server for a long time, for instance. Then when you are ready to move to the live server, you can go into Project > Properties > File Transfer and clear the box Use the connection as default or just choose the one you want from the drop down.