Andrew.

I just tried rendering a short Test SGU. Exactly as I did yesterday, and have done for decade, using the WAV toolbar button. This time the SGU re-opens every time as it did in past years, with the chord-chart unchanged.

That is not what happened yesterday. And - see posts above - Music Student & Jim Fogle advise against Rendering. The former says: <<Dont do that! When you render, you have converted you tracks to performance tracks (orange). No need for that and you see what the downside is.>>

So it's not just me.

I now no longer know if rendering a SGU will work as it has done for years (and did again just now) and re-open cleanly. Or whether it will do what it did yesterday, and what other posters say - turn orange with the content obliterated when it's re-opened.

Grateful for advice.

Best for Xmas. Andy