User is not able to change the Start and End Row via Excel Addin but it is working as expected via the Winshuttle Product itself.
To over come this issue uninstall 32 bit Excel and install 64 bit Excel instead. Also please make sure to Install Winshuttle 64 bit as well.
This is windows upgrade issue which created problem for the addin text fields read only.
Jira - WIN-38135 can be reviewed for same ** Winshuttle Internal User Only***