Exports X-Sequence as a file (jsx), which can be opened in Adobe After Effects (on the same PC). It saves place on disk because generated file refers to already existing files.
Clip and layer duration is exact the same as in X-Sequencer.
Then open Adobe ExtendScript, load jsx file from AnimatorHD, switch link to After Effects and run script. X-Sequence will be opened in After Effects.

If you need move sequence to the other computer or use another edit application (Avid, Final Cut) you can export X-Sequence as regular image sequence using 'Export X-Sequence as Frames Sequence' operation.