Quick workaround is to change your ASDM launcher shortcut to point to Java 6 which may well still be on your client. Assuming it's Windows 7, look at the Control Panel -> Programs and Features, and you'll probably find a few different versions of Java there. Typically, the ASDM launcher shortcut target will end up looking something like this:
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...