I have not seen this question before.
I have used older versions of Music Maker without problems before.
Before I downloaded the above 2013 version addons I had he Soundpools showing at foot but not working & a message that Vita needed loading via help.
I downloaded both but I now have no Soundpools at all (all blank) shown & still a message saying Vita can't be found.
My PC
Case Cooler Master Elite 360 - Mini tower - ATX CPU CPU
CPU - Intel Core i7 2600K / 3.4 GHz - LGA1155 Socket - L3 8 MB
Motherboard - Asrock Z68 PRO3-M Micro-ATX Motherboard
Memory Corsair - CMX8GX3M2A1333C9 - Memory - DDR3 1333 - 8 GB
Graphics Card None ................ i7 3000, I tried a GT520 Slower than the integrated Intel, sent back!
Hard Drive - Western Digital Caviar Black - Internal Hard Drive 3.5 "- 1 TB SATA III
INet - Wireless TP-Link - TL-WN851N - Wireless N PCI Card - 300Mbps - MiMo - 2 antennas
Power Supply Be Quiet - BQT L7-530W - PC Power Supply - ATX - 530 W. Not so QUIET not good, buy another. DVD R / Writer - Liteon iHAS324
DVD Player recorder - Liteon IHAS 124 internal
Internal multi card reader - LECT-MUL-CAR -C109 Multi-card Reader Internal 3.5 "