PTGui + Samyang 8mm lens settings problem

[Wrona]

I've been working for a long time without any problems, but something
has changed wit settings, and I can not stitch spherical panorama, it
seems like somewhere are stored wrong settings for Samyang manual
lens.
Should I remove any PTGui settings before I reinstall it ?

[PTGui Support]

Hi Wrona,

You can do
File - Reset Default Project Settings
to remove any custom settings you have made. Reinstalling the software
will not make any difference.

If you can't solve the problem please see 3.17:
http://www.ptgui.com/support.html#3_17

Joost