The Intel Application Accelerator replaces the ATA drivers that come with Windows with drivers optimized for Intel desktop and mobile PCs. It reduces the storage sub-system bottleneck, enabling the processor and other system level hardware to be more productive and efficient. In most cases, it is not a requirement for your operating system to work properly.
Asus has the new version for download. It"s the multilanguage release thus the 5Mbyte filesize. It appears to be WHQL certified. No news on changes yet.