Hi,
On Mac OS, security settings are set on "always execute macros" but it doesn't work.
I found a trick :
"Excel" > "Modifier" opens 2 windows, including "CaveRenderPro.txt" which is read-only.
Close this document (let the Macro Windows open).
And re-open it from the finder (/Applications/CaveRenderPro/CaveRenderPro.txt).
Make the modifications on Excel, save the file, then run the macro (Developer> Macros> Execute), save again (maybe it's too much but it works for me).
After this steps I could re-import