It’s a bit tricky but it works.
Basically, you need to export it with the matlab-script demonstrated by ttho in his tool. This gives you a CSV table with coordinates and single values per date. I import this in excel and create an additional header with the date formatted as required by the plugin (D20181017). Once this is done, you can save it as a CSV and import it into QGIS with the “add delimited text” option.
To save RAM, save it as a Shapefile.
This file demonstrates how exactly the attribute table should be formatted to be used in the QGIS plugin: https://gitlab.com/faunalia/ps-speed/tree/master/testdata/shape
It is close to what is exported from Matlab but some adjustments have to be made.