I'm getting an overflow exception in 2.0.13 and 2.0.14 when exporting to unity as follows:
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If run, the error clears from the log, and everything seems to work ok.
Secondly, if I export again the files disappear from the project view and in explorer I can see the new files have been created with "2" appended on the end - I don't know if this issue is related to the first, but thought I'd mention it in case it is.
I've managed to fix the first issue by recreating the project.
I'm still experiencing the second issue, but noticed that if I export to desktop from spine and then manually overwrite the files in explorer, everything updates correctly.
It seems to be an issue with overwriting existing files in 2.x ?