PaintTool SAI might be a bit more popular than DesignDoll. We know about 3 links to it since March 2021 and only 3 links to DesignDoll. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I always look up pose references and just copy them tbh, I'm not confident enough to change them, so I either search for one or use a 3d model program where you can adjust and pose your model design doll is actually pretty good for this and it's free. Source: 12 months ago
Https://justsketch.me/ or https://terawell.net/en/ (DesignDoll). Source: about 1 year ago
To answer your second and third questions, lots of practice and keeping wealth as low as possible. For the hands, DesignDoll helps a lot ;). Source: over 2 years ago
I'm curious, where is your PTS folder? If you put it in c:\program files or c:\program files (x86), it might cause problems. More info here: https://systemax.jp/en/sai/. Source: about 1 year ago
I would contact Systemax Software, the maker of SAI. Here's their website: https://systemax.jp/en/sai/. Source: almost 2 years ago
Where did you download it from? If you didn't get it from https://systemax.jp/en/sai/ then it could be sideloaded malware. Source: about 2 years ago
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
MakeHuman - MakeHuman is a free, open source, interactive modeling tool for creating custom 3D human characters.
Clip Studio Paint - The artist's software for drawing and painting.
DAZ 3D - Daz 3D, 3D Models, 3D Animation, 3D Software
MyPaint - MyPaint is a fast, distraction-free, and easy painting tool for digital artists.