I included three .sc files: the original from my addons folder, the exported planet, and exported system. I'm including these just in case because the bug seems too random and hard to produce.

Read the forum rules, you need to make 10 posts in existing threads before you can edit posts or create new threads.
I do not know how you solved your problem. Especially the part with the 'fix in the addons folder' irritates me somewhat. You do not need a fix. You only need to save your script in the 'ANSI' format, not in 'UTF.8' format. SpaceEngine does not work with 'UTF-8'
HarbingerDawn,Gaters, if you have a CPU with integrated graphics, make sure you force SE to use your Radeon graphics card, or disable integrated graphics in the BIOS. SE should do this automatically, but it's worth checking. Also, it would be helpful if you would upload your log file as described in the opening post.
Until this is done, you can use this script.
// Filename: Kepler-64b.sc
// Put in 'addons\catalogs\planets'
//------------------------------------------------------------------------------
Remove "PH1/Kepler-64 b" {ParentBody "Kepler-64"}
Planet "PH1/Kepler-64 b/KIC 4862625 b"
{
ParentBody "Kepler-64 (AB)"
Mass 168.646
Radius 39535.076
DiscMethod "Transit"
DiscDate "2013"
Orbit
{
Period 0.3792168699
SemiMajorAxis 0.634
Eccentricity 0.0539
Inclination 90
ArgOfPericen 348
}
}
//------------------------------------------------------------------------------
Disable comet tails. (Sixth symbol from the top in the right toolbar.)