FLASM is a tool that is capable of decompressing and disassembling SWF files. It can be downloaded from http://nowrap.de/flasm.html. We decompressed demo01.swf using the -x parameter and got the following output:

After that, we used the -d parameter to disassemble the file where it showed information about how the SWF was structured:

We can't see any disassembled nor decompiled action scripts here.