The software is easily available on the official site. You can just click on the Download option and get it installed in few minutes on your system. Hopefully, the problem should have been resolved by now. But in case, you still have doubts on this or you are stuck in between due to technical issues, then contact the customer care service of Malwarebytes.
To remove virus or malware with this antivirus tool, you need to focus on two major things. The first thing is installing the software properly. The second thing is conducting software scanning regularly. For software scanning, you need to follow some basic things. Do not run other programs when scanning is going on. You should also check report properly and take suitable actions as suggested on screen. Call Malwarebytes Contact Support for Malwarebytes for more assistance.
More Info- http://www.antivirustechnicalservice.com/
http://www.antivirustechnicalservice.com/blog/how-to-recover-my-malwarebytes/