Tor Browser Bundle 4.0: updater fails on Windows

Tor Browser Updates works fine on Windows 7 32-bit, but fails on Win XP sp3 32 bit

Steps to reproduce:

1. Download and install "torbrowser-install-4.0-alpha-3_es-ES.exe" or "torbrowser-install-4.0-alpha-3_en-US.exe" in a clean directory from https://archive.torproject.org/tor-package-archive/torbrowser/4.0-alpha-3/

2. Run installed Tor Browser from created shortcut

3. Go to Help ... About Tor Browser and press "Check for updates"

4. When download finishes, click on restart to apply update

Actual results:

Tor Browser won't update and also will not start anymore.

Update files are leaved on \Tor Browser\Browser\TorBrowser\Data\Browser\Caches\firefox\updates\0

Expected Results:

Tor Browser should update from 4.0-aplha-3 to 4.0 stable as it does on Windows 7

Workaround: Remove update files from "...\Tor Browser\Browser\TorBrowser\Data\Browser\Caches\firefox" to let non-updated TBB run again.

Trac:
Username: marc