is back. The controversial music storage and streaming service is running again, its operator announced on Tuesday.

The service was suspended in April following legal challenges to its operation. lets users listen to their CD collections from any computer with an Internet connection. It does this by streaming the songs from the company's database of 750,000 audio files - as long as users first prove they own the CDs by registering them with the service.

In its new incarnation, will still offer a limited, free version of the service, but there also is now a subscription-based version.

The free service is funded by on-screen advertising and allows users to register 25 CDs, while subscribers paying £35.22 per year can register up to 500 CDs.

The subscription service carries less advertising than the free account and offers more functions, such as the ability to buy CDs online, says in a statement.

Consumers who had previously opened a account will be able to access music with their old password, the company says. withdrew the original service after the five major record labels filed lawsuits against it in January. Universal Music Group, Warner Brothers Music Group, EMI Group, BMG Entertainment, and Sony Music Entertainment sued for copyright infringement.

While Warner Brothers, EMI, BMG, and Sony settled their suits against for an estimated £14.1 million each, Universal continued its legal action, and on 6 September a judge found guilty of "willfully infringing" Universal's copyrights by including an estimated 4700 of Universal's CDs in its song database without permission.

Two days later, however, announced that based on its settlements with the other four major music labels, it would be relaunching the service. The settlements allow to include CDs from those labels' back catalogs in the service.

The Universal case drew to a close on November 14, when was ordered to pay £37.65 million to Universal to settle charges of copyright infringement, but the company's legal troubles are not over yet.

On 16 November music company Unity Entertainment and others filed a class action complaint against for copyright infringement.