It depends on when you bought Pro & who you paid for Pro. If you paid Limewire LLC less than 6 months ago, you should be able to download another version of Pro. There's no phone number for support & the only way to get email support is via the link here Lime Wire » LimeWire PRO Support Center
The only official site is Lime Wire » Official Website & Free Download, BitTorrent «

Read through this, it might help to clarify things.
ATTENTION: LW Pro users!! Update info!!