Yes it needs to be a bit more user friendly and EZ to use, at the moment you need to double click the drag button on the track to enable sync to host but select the track name to preview the track with the Play button.
You can have Ctrl/Cmd click to select the track/s or to make it simpler just left click, Alt/Opt click to deselect all rather than normal click and losing all the selected tracks (selected tracks stand out).
If you enable Sync to Host it will play back the selected tracks in sync with the DAW.
If you hit Play in the Plugin it will play just the selected tracks.
And again the generated local constant tempo tracks need to be able to play back in sync with the DAW Tempo map when sync previewing so it would work out the time pos by the number of bars/beats and tempo of the local file then on seek it will go to that bar in the file and play @ current tempo, so no matter where the DAW starts play the same bar @ x time will be played in the local file.
If the ACID was enabled then the file will fit the DAW tempo map automatically when dragged in else you set the tempo of the track in the DAW and it will fit the tempo map.
If you have Reaper, one of the DAW's that don't fit Acidized files to the tempo map you can use this method Video: Fit Biab Plugin Tracks to Reaper Tempo Map
this is not ideal using stretch markers so eventually the plugin will need a decimal point tempo map like RealBand so the files are rendered to the DAW's tempo map, as not all DAW's will fit Acidized files to the tempo map.