Stimulus list capacity

For some reason version 6 of the Superlab can not take more than 100 pictures in total across the stimulus lists and gives an error ‘Unable to load a stimulus file’. At the same time version 4 could take more than 2 thousand pictures.

Also, if I add another picture to the stimulus folder on my computer, version 6 does not see it. If I delete a picture from my computer folder, the experiment won’t start, saying the file cannot be found. I have to reload the whole stimulus list every time I add or delete files on the computer. Again it was perfectly fine in version 4.

Is there any way around these limitations, especially the number of files in stimulus lists?