Thank you all for your responses. Does v11 backward compatible with all the modules written for v9 & 10? Or do I need to plan on getting new versions of some/all of those?
And do I need to delete v10 before installing v11? Or does a v11 install automatically replace the existing v10 installation?
On resources, Yes.
On older versions of e-Sword. My advice is to uninstall your older version. This is a practice I have done over the years I've used e-Sword. From my perspective I find this is the safest way because upgrading previous installations can cause some difficulties, and the best way to circumvent any possible issues is to do a clean install.
Blessings,