Of course it's free. You probably can install on a different drive. But ... since this is a new version, not a continuation of the LW 4.12 series, it may corrupt your incompletes when you open 4.10.9 again. In other words 4.10.9 may refuse to load them so although you could resume them, they'd start from zero %.

The new beta is bad. I used for about 3 days and deleted it. Got a bad virus from it. Never had that problem with Limewire.

[Sarcasm] And of course it's all Limewires fault, that you can't see the difference between a real file and a virus. Why didn't I think of that. It's very good that you pointed it out to all of the unsuspecting users, who actually thought the viruses were on the network. After reading this revelation I'll hurry and dump that mean Limewire Beta, that goes around giving everybody viruses.[/Sarcasm]