v5.4.0

A new Health Check screen, and a fix for a crash that could shut your
console down.

• New: Health Check. One screen that tells you whether your console and
  this app are set up correctly and working. It checks the connection, the
  helper, storage, system settings and Remote Play, and puts a Fix button
  next to anything it can repair for you. Where something genuinely cannot
  be checked on your firmware, it says so rather than pretending it passed
  or failed.
• Clean up leftover files. Health Check finds unfinished files left
  behind by interrupted transfers and offers to delete them. It shows you
  the exact list and total size first, and only ever touches its own
  folders.
• Fixed a crash that could shut the console down. Opening the Profile
  screen while Remote Play was being checked in the background could crash
  the console and force a restart. Two things were talking to the same part
  of the system at once; they now take turns.
• Play-time totals can no longer be lost. If the console ran out of
  space while saving, the file was replaced with an incomplete one and every
  recorded total was gone. It now leaves the previous file alone if the save
  does not fully succeed.
• One of the built-in cheat sources returned nothing. It was looking in
  the wrong place, so it silently contributed no results. It now works, and
  roughly doubles the number of cheats you can find.
• Remote Play works. It never has: the helper called one of Sony's
  functions the wrong way and gave up before it started. You can now pair
  a device from the Remote Play screen and get a PIN.
• The Remote Play screen tells you what's missing. Instead of an error
  code, you get a short checklist — signed in, account activated, Remote
  Play on, and (on firmware 10.00 and later) allowed for your user — with
  a button next to anything it can fix for you.
• Date and time settings work again. The console's timezone and clock
  format were always blank. Same underlying cause as Remote Play: the
  helper could not read the console's settings at all.
• .rar uploads no longer need free space on your PC. A .rar used to
  be extracted in full before anything was sent, so a 180 GB game needed
  180 GB free on top of the archive. It is now decompressed and sent at the
  same time, exactly like .zip and .7z — nothing is written to your disk
  at all.
• Because of that, the FTX2_ARCHIVE_STAGE_MB setting is gone. It is no
  longer needed; you can delete it if you set it.
• A failed .rar upload can no longer leave a part-extracted folder behind,
  because there is no longer anywhere for one to be left.
• Added a disclaimer. This is research and homebrew software for
  consoles you own, provided as is, and you take responsibility for what you
  do with it. See DISCLAIMER.md.

Verified on two consoles — firmware 5.10 and 9.60 — including the crash
fix, the health checks, and a real 9-volume, 127 GB password-protected
archive (181 files, every name and size matching).