Hi,
for some reasons GetBundles' behaviour became unstable in the last couple of days. Up to now I've no explanation for it.
For me the following fixed this more or less: If GetBundles hangs (in the Log File you should find something like "Error while initialization. Invalid argument") go to TM's main menu > Bundles > GetBundles > "Close Dialog" and retry invoking GetBundles.
Could you please tell me the output of:
TM's main menu > Bundles > GetBundles > Help > Requirements > "Check Requirements"
and which OSX version do you are running?
Best, --Hans