I just had "RAS" appearing in place of YT image (Your script image). There was no crash, just "Ras".
Portable Foobar with EsPlaylist - Skin LUR.
Windows 7
UI Hacks: virtual disk hooks OK (0x0300)
UI Hacks: DLL-hijacking succeeded
UI Hacks: hooks status 0x430000
Components loaded in: 0:00.049533
Configuration read in: 0:00.006434
Watching: D:\Musique
WSH Panel Mod ({7E59A5FF-3876-4BA1-96BE-BE7C07BF25AC}): initialized in 21 ms
Album list panel: initialised in 0.006 s
WSH Panel Mod ({4CA857F1-AC93-42E2-8710-3D5AA5895DA7}): initialized in 0 ms
WSH Panel Mod (YouTube Track Manager v0.6 beta by Wilb): initialized in 10 ms
User Interface initialized in: 0:00.552895
Startup time : 0:00.736476
Opening track for playback: "D:\Musique\Jazz\Ahmad Jamal\Ahmad Jamal - Swahililand.flac"
Wave cache: finished analysis of "D:\Musique\Jazz\Ahmad Jamal\Ahmad Jamal - Swahililand.flac"
Opening track for playback: "3dydfy://www.youtube.com/watch?fb2k_title=All%20Blues&fb2k_artist=Ron%20Carter&v=Z53ytYBJ5m4"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Autobackup: Backed up 103 items to autobackup.20140512-113333.zip
Opening track for playback: "3dydfy://www.youtube.com/watch?fb2k_title=Ray%20Allen%203%20Point%20King%20Mix%202011%20%5BA%20Hundred%20Dreams%20From%20Now%5D&fb2k_artist=Ray%20Bryant&v=7f88goWdwO4"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Opening track for playback: "3dydfy://www.youtube.com/watch?fb2k_title=No%20Woman%20No%20Cry&fb2k_artist=Monty%20Alexander&v=FaFdK_hXBnU"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Opening track for playback: "3dydfy://www.youtube.com/watch?fb2k_title=Blackbird&fb2k_artist=Brad%20Mehldau&v=Fw-X5GTiYGw"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Opening track for playback: "D:\Musique\Italia\Claudio Baglioni\Assieme\Mille giorni di te e di me.flac"
Opening track for playback: "3dydfy://www.youtube.com/watch?fb2k_title=Troppo%20Amore&fb2k_artist=Michele%20Zarrillo&v=DMAJG3gPf6I"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Opening track for playback: "3dydfy://www.youtube.com/watch?fb2k_title=Riccardo%20Cocciante%20%22Ti%20scorder%C3%B2%2C%20ti%20scorder%C3%B2%22%20%5BTi%20Scordero'%2C%20Ti%20Scordero'%5D&fb2k_artist=Riccardo%20Cocciante&v=Gxq3ZVugVKA"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Wave cache: finished analysis of "3dydfy://www.youtube.com/watch?fb2k_title=Ray%20Allen%203%20Point%20King%20Mix%202011%20%5BA%20Hundred%20Dreams%20From%20Now%5D&fb2k_artist=Ray%20Bryant&v=7f88goWdwO4"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Error: WSH Panel Mod (YouTube Track Manager v0.6 beta by Wilb): Erreur d'exécution Microsoft JScript:
'undefined' a la valeur Null ou n'est pas un objet
File: <main>
Ln: 2406, Col: 21
<source text only available at compile time>
Reading from MP4 file failed: frame 12926 of 12929.
Wave cache: generic IO exception (3dydfy: Write error) for "3dydfy://www.youtube.com/watch?fb2k_title=Blackbird&fb2k_artist=Brad%20Mehldau&v=Fw-X5GTiYGw"
Wave cache: finished analysis of "D:\Musique\Italia\Claudio Baglioni\Assieme\Mille giorni di te e di me.flac"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Autosaving... (I)
Configuration saved in: 0:00.081475
Autobackup: Backed up 104 items to autobackup.20140512-113803.zip
Wave cache: finished analysis of "3dydfy://www.youtube.com/watch?fb2k_title=All%20Blues&fb2k_artist=Ron%20Carter&v=Z53ytYBJ5m4"
3dydfy, opening mp4: download - foo_youtube, decode - foobar2000
Wave cache: finished analysis of "3dydfy://www.youtube.com/watch?fb2k_title=Troppo%20Amore&fb2k_artist=Michele%20Zarrillo&v=DMAJG3gPf6I"
I replaced in your last 0.6 script v0.5 beta by v0.6 beta