hey, I had the same problem these days. I imported a .srt file as open captions, I had to edit the content a lot, adding/deleting/formating the lines of subtitle. In order to export a new .srt from adobe CC, I made a subsequence ( right click on the captions track from my timeline- new subsequence), then the option from FILE- EXPORT- CAPTIONS became available again. maybe this is helpful for some of you. In VLC was a slightly delay (less than 2 seconds), but I could adjust it quite easily in subtitle edit. I don’t know what causes the delay, but at least the export works with this unintuitive solution.
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