SID Player updates:
~2000 additional SIDs are now playable
(about 90% of 57k known SIDs now playable)
Show addr range, init addr, play addr, and clock type on SID info page
Added YYZ (Rush) to SID Covers local menu
Remote Launch updates from @hExx
CopyFileCommand and DeleteFileCommand via USB Serial
Swiftlink/Browser updates:
Expanded/detailed to browser local help menu (? command)
System Timezone update
Timezone UTC offset resolution now 30 minutes @VK5LN Michael recommendation/request)
hour offset range is -12.0 to +14.0 step 0.5
TZ will need to adjust from the previous value after this update

See details in the release notes, those and the latest .hex files are here:
https://github.com/SensoriumEmbedded/TeensyROM/tree/main/bin/TeensyROM (edited)