It depends on what software release you want to upgrade to.
As per the release notes, a VCS with a 52A2xxxx serial number can only run up to software release X8.8.2. If that's as far as you want to run, then, yes, you can upgrade.
If you want to run a more recent software release, then you cannot do so on that old hardware, and your best bet would be to consider migrating from the hardware appliance to a Virtual Machine. There is a $0 SKU you can purchase (R-VMVCS-E-M-K9) to enable you to migrate your licencing from the physical appliance to a virtual assuming you have the capability to run the VCS-E on some other existing VM infrastructure.
Wayne
Please remember to mark helpful responses and to set your question as answered if appropriate.
