Your database is well out of date.
You can find the correct Sentinel for your HP-II on this page:
info.uniden.com
Install Sentinel, then update the database in the software. Once you've done that, then connect your HP-2 to your PC &, looking at the onscreen prompts, put the scanner in Mass Storage Mode. Once it's in that mode, you can send the updated database to the scanner. If you did not get the cable for the scanner (it's the same one you can use to power the scanner), it's a simple USB to USB Mini cable. Tons of them available, in variuous links, on Amazon. Here's one example:
There are many more on Amazon, at various lengths.
There have been no firmware updates for the HP-2.
There is an online 'Easier to Read' manual for your HP-2 & it's version of Sentinel.