acer launch manager not compatible with windows 7?

I have an aspire s3-391 and I just reinstalled win7. I downloaded the acer launch manager driver for my s3-391 and tried to install it. I'm getting the following error..

"Sorry! this operating system is not suppored."

Here is the link to the file just in case.

http://global-download.acer.com/GDFiles/Application/LaunchManager/LaunchManager_Acer_8.00.8101_W81x64_A.zip?acerid=635537145878699022&Step1=ULTRA-THIN&Step2=ASPIRE&Step3=ASPIRE%20S3-391&OS=ALL&LC=en&BC=ACER&SC=PA_6

I have a fresh install of win7 ultimate sp1.. Is it only compatible with win8 and up? Is there an alternative?

I'm trying to get my fn key to work again..