Again in troubles

[abel]

I apologize for not remembering the previous answer, but I remember clearly that I already asked this question on different occasion and it was answered. Now, recently I d/ded a torrent with a collection of Astrid Lindgren movies, like Pippi, Madita, Brothers Lionheart etc. (in Swedish). After it was finished I got with every movie a bunch of short files in for me mysterious format .r01 up to .r99. My Boilsoft Video Joiner says it can´t handle it. No idea, no clue what to do. Thanks in advance for every advice (this time I´ll note it somewhere outside of my PC).