Sonic Pi Wont load past welcome screen

@samaaron thanks for such a fast reply!
After two reboots of my laptop, Sonic Pi has finally loaded, yay!

But in case I have this problem again I’ll describe the details. Everything starts exactly as Odul described it above, but even after I press “End task” for all the copies of Sonic Pi process in the Task manager, the app notifies me that its another copy is still running. Then it tries to restart the process and I see the welcome screen again; nothing happens.

Regarding the log files - most of them, including scsynth.log, are just empty. This is all I’ve found:

  1. server-output.log

Sonic Pi server booting…
Using protocol: udp
Detecting port numbers…
Send port: 4558
Listen port: 4557
Port 4557 unavailable. Perhaps Sonic Pi is already running?

  1. gui.log

[GUI] - Detecting port numbers…
[GUI] - GUI OSC listen port 4558
[GUI] - port: 4558 [OK]
[GUI] - Server OSC listen port 4557
[GUI] - port: 4557 [Not Available]
[GUI] - Server incoming OSC cues port 4559
[GUI] - port: 4559 [OK]
[GUI] - Scsynth port 4556
[GUI] - port: 4556 [Not Available]
[GUI] - Server OSC out port 4558
[GUI] - GUI OSC out port 4557
[GUI] - Scsynth send port 4556
[GUI] - Erlang router port 4560
[GUI] - port: 4560 [Not Available]
[GUI] - OSC MIDI out port 4561
[GUI] - port: 4561 [Not Available]
[GUI] - OSC MIDI in port 4562
[GUI] - port: 4562 [Not Available]
[GUI] - Init script completed
[GUI] - using default editor colours
[GUI] - launching Sonic Pi Server:
[GUI] - starting UDP OSC Server on port 4558…
[GUI] - UDP OSC Server ready and listening
[GUI] - Ruby server pid registered: 2272
[GUI] - waiting for Sonic Pi Server to boot…
.
[GUI] - Sonic Pi Server failed to start with this error message:
> Port unavailable: 4557, is scsynth already running?
[GUI] - UDP OSC Server no longer listening

[GUI] - Critical error! Could not boot Sonic Pi Server.

  1. processes.log

No pids store found here: D:/SonicPiPortable/Data/Temp/sonic-pi-pids
Exiting
Creating pids store: D:/SonicPiPortable/Data/Temp/sonic-pi-pids
Started [2272] [-] “D:\SonicPiPortable\App\Sonic Pi\app\gui\qt\release…\app\server\native\ruby\bin\ruby.exe” --enable-frozen-string-literal -E utf-8 “D:\SonicPiPortable\App\Sonic Pi\app\gui\qt\release…\app\server\ruby\bin\sonic-pi-server.rb” -u 4557 4558 4556 4556 4559 4560 4561 4562 [-] D:/SonicPiPortable/Data/Temp/sonic-pi-pids/2272