Sorry you are having trouble!
The forum will automatically remove your license information when you post logs.
Slow file system access log messages mean you are using a network drive that is very slow.
It's surprising you run out of memory. You might consider other ways to arrange your project, for example to create attachments/skins at runtime:
Runtime Skins - Spine Runtimes Guide: Creating attachments
You can change the max memory Spine can use by passing a command line parameter when Spine is started. For example:
That gives Spine a maximum of 4GB. You can replace 4096 with the number of megabytes you want to allow Spine to use. For example for 16GB use
-Xmx16384m (16 * 1024 = 16384).