We migrated from 10 to 11.4 last year and found that most but not all templates with embedded scripts worked without any issue.
We went trough a rigorous testing process of all of our critical scripts/templates. Our reason for upgrading was the company was moving to Office 365 and this included Excel 2016. Excel 2016 is not compatible the Winshuttle 10. I have a second PC that has not been upgraded, just to be able to support the version 10 scripts and embedded templates. As scripts need to be revised for changing business functions, we are rebuilding them in version 11. This should line us up for moving to version 12.
For the long term we are working on rebuilding the version 10 scripts in version 11. Version 11 and 12 offer better handling of special requirements and performance in SAP.
Hope this helps answer your question. Winshuttle support was very helpful in addressing a couple of the different ways the newer platform handled script building.
Good luck and reach out if you have further questions.
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John Kelly | Senior Product Data Analyst
Dorman Products Inc. | (215) 712-5256
dkelly@dormanproducts.com------------------------------