A: Maybe for a week. But modern antivirus software (and Waves' own "Waterfall" piracy detection) will eventually corrupt your DAW. Not worth the headache.
Don't want to download anything? Use your DAW’s stock compressor with these settings to mimic the CLA-2a: Waves Cla-2a Compressor- Free Download
The CLA-2A is modeled after Chris Lord-Alge's personal vintage hardware, capturing its unique harmonic saturation and program-dependent response. Opto Compression A: Maybe for a week
: It is famous for its "slow" attack and two-stage release, which makes vocals sound consistent and professional without sounding "over-compressed". Waves Cla-2a Compressor- Free Download