There’s a new (valid) PiTool upgrade available (1.0.1.266) in PiTool which is the same as 1.0.2.086 v7:
https://community.openmr.ai/t/8kx-terrible-performance-in-steam-after-pitool-1-0-1-266-update-steam-vr-wont-open/33376/8?u=drwilken
https://community.openmr.ai/t/8kx-terrible-performance-in-steam-after-pitool-1-0-1-266-update-steam-vr-wont-open/33376/9?u=drwilken
TLDR; It’s now “safe” to use the update function in PiTool.
@arminelec/@SweViver: You probably already know guys, but just in case You missed it, I’m tagging You anyway… 
You might want to update these topics to avoid confusion as it’s now “safe” to just use the regular PiTool available via the update function…
Another note: Don’t forget to update the notice when installing Pimax Experience (the actual message box in the installer) as it says You need at least v1.0.2.86 (or was it 84) which may be confusing (in case anyone actually reads it)… 
https://community.openmr.ai/t/pimax-vr-experience-0-70-0-0-beta-available-now/33293
https://community.openmr.ai/t/pimax-vr-experience-version-0-70-0-0-beta-available-now/33294
https://community.openmr.ai/t/pimax-vr-experience-0-70-0-0-beta/33295
Users will still need to re-install Pimax Experience after updating though!
EDIT: The PiTool package can be downloaded from here: