Q: Which version of factorio should be used?
A: For 0.18, use Factorio version 0.18.15 with ModMyFactory, otherwise use 0.17.79 with version 0.3.7 of the modpack
Q: The modpack doesn't work!
A: Use the included .fmp file with ModMyFactory to get a set of mod versions that work with each other.
Q: The specific version of a mod is no longer available?
A: Download the closest available version of the mod, that is still compatible with Factorio 0.18.15, preferably get a newer version of the mod. If that version doesn't work, then get an older version. If it still doesn't work, use Factorio 0.17.79 instead.