xlights 4 Model previews complete but house preview only 1/2 there

[roverdish]

I only have 3 models. Roofline group I created, pixel curtain group I created and a 16 strand flat pixel tree created using the xlights model.

I am just learning the 4. xlights and I cannot get the 16 strand tree to play back correctly in my house preview. I am only seeing the 1st 8 strands playing. However in the model preview the complete pixel tree plays correctly on all 16 strands.
Please someone point out my stupidity so I can quit OCD ing about this.

Should I have completely removed my 3.15 version before loading the newer 4.?

Thanks
Chip

[Gilrock]

Are you really installing xLights 4?  That's way old.  You should install one of latest version like 2017.24.

[roverdish]

Thanks for the suggestion. I will load up 2017.24 on the office computer and see if it works better for me.
I have been happy using the ancient 3.15 version but I would like to use some of the newer effects afforded by the newer software.