All working fine here with Live Suite 10.0.06 in 64bit, those .als project files are definitely not 32bit ones, only warning you should get is about the plug-in that can't be find if you don't own them all, but that's it. It should open in a x64 Live install.
What version of Live are you running ? Do you have any error message ?
Also maybe it's good to try a nes fresh download and use another archive extractor application to avoid any files corruption issue.
i.e : Here is the last .ALS file from the project folder, opened in Live 10
( You need to use the "Continue discussion on the forums" link below to view the screenshot.