Hi,
Yes, as long as you are using the version that applies to the license you purchased.
Look for the registration code email you received when you first purchased the license. Make note of the date shown on the email.
Go to http://oldversiondownload.com/ and use find (CTRL+F) to search for MixPad. Look for the version with the date closest to your date of purchase and install that on your computer. You should be able to re-register it with your registration code.
I hope that helps.