: "41" may refer to Volume 46, Issue 21 (2021) or a specific article numbered 41 within a 2021 supplement. Key 2021 Research Topics :
While not a drop-in replacement, (free) and Synfig Studio (open source) can import some Spine 4.1 skeletal data if you convert the JSON format first. spine 41 2021 download
The 2021-era updates focused on performance and stability. Fixes included resolving flickering with "tint black" color timelines and improving the import of attachments as sequences. : "41" may refer to Volume 46, Issue
"Forty-one gigabytes," he whispered. "The coincidence is too perfect." spine 41 2021 download
How to Install a Specific Spine Version (4.1.24) on a New Computer?