We have stumbled across an issue related to regional settings and the new Options feature in the character sheets (as related to fonts). Users using a region with a period as the decimal separator shouldn't be affected by this issue.
I have posted a new update of the official sheet on my site at
http://www.misersoft.com/gca4/ that corrects for what we've found so far.
If your 'charactersheet.gcs' sheet is hanging with the "it's taking too long" message, try the updated one.
Sorry for the issues,
Armin