preserve automatic slide transition times between 3.5.x and 4.x Impress

When creating an Impress slide show on my PC with version 4.x I setup the automatic slide transitions for 15 seconds each, saving and then transferring to a Raspberry Pi, which uses version 3.5.x, the slide transition changes to the default of 3 seconds. Is there any way to preserve the transition time without installing 3.5.x on my PC? Thanks.