The Standard version is free for 10 hours with discounts on the other Pro Editions.
Decent tool to test and monitor your Hard Drives over the long term. V5.5 also supports SSDs.
Comparison between Free | Standard | Pro
Get it now and install within two weeks. If you lose your installer or have to re-install after the two week period, you won't be able to.
Thanks to nicksman:
If you need to install after the promo period, change the date for your PC to within the promotion period (e.g. today's date) and it will install.
Edit : They've given us another day, so keep going!
Great bit of software. I got it last time it was free from them and still use it (helped diagnose a failing hard drive that was throwing up the occasional issue). I just built a new PC and was still able to reinstall the software on the new PC even after the time to register had expired by keeping the zip file.