Captions file alternatives

Hello!

Quite new to lectora but starting to figure out the basics.

I have a strange problem. Its listed at several places, that XML, VTT and SRT are acceptable file formats for adding captions. 

And in the captions dialog, there is also examples of these three file types. But when chosing Captions file, SRT are not listed in the acceptable file formats and can not be chosen, VTT is listed but cant be choosen. Only XML can be chosen.

And another thing about XML, the XML format thats accapted by Lecora is very much differet from XML caption files exported from video editing soft ware such as Premiere pro. 

But my main issue is getting the SRT to work. That would be a hughe win for my workflow. 

Does anyone have any idea what this issue is due to?

Thanks in advance

/Joakim