Unlocked is unlocked. Hard resets and software upgrades will not change that, so no worries there. Give it a hard reset and see if it clears.
If you want to reinstall, you'll need to modify your installer files as it's sensing your software version and doesn't see the need to install.
To do that, first open the installer. Then search for this file "payloads.xml". When you start the installer it unpacks all the files into a temp folder that a standard search won't find, so you'll probably need to go into the advanced find options and check the box to search in system folders.
Open the file in Notepad. You'll see it's pretty simple with only a few parameters. You'll need to change the upper revision range to something higher than what you have installed on your device (make it 2.28).
Close the file and continue with the install process.
Or you could load it by using an SD card and the built in bootloader. For full instructions on all that, check my post here:
http://www.everythingtreo.com/forum/...html#post62996 http://www.everythingtreo.com/forum/...html#post62996