You are missing a tab the one for Variant Classes. Could you please add it?
From the documentation for the Pathfinder editor.
"Class Variant
Variant Classes modify the properties of a class. In various places, they are called "Variant Classes", "Class Feature Variations", "Alternate Class Features", or "Racial Substitution Levels".
* Every Variant Class must have a "Class To Modify" selected.
* If a Variant Class modifies only one level of a class, enter that level in the "Variant Class Level" field. If it alters all the levels of a class, leave this value blank. If a level is selected, any modifications to the Hit Dice or Skill Points are only applied to that level. All other modifications will apply to all levels.
* If an aspect of the class has not changed, there is no need to enter any values for the class modification. For example, if this class variant gets the same number of skill points per level as an un-varied member of this class, the "Skill Points per Level Override" can be left blank.
* If information in an array (ex: the number of bonus feats per level) or a matrix (ex: the number of spells known) is changed by a variant class, only the difference needs to be entered. For example, if a class receives one fewer 2nd-level spell known at 4th level and thereafter, in the matrix, column 2 is the 2nd-level spells, and the 4th row down (labeled "3") represents level 4. Enter -1 in this box. HeroLab will assume that a value you enter applies for the rest of a column, so in this case, the -2 2nd-level spell known will be applied at 4th level, 5th level, and so on.
* If the Variant Class receives a minion at a different level than the normal class does, enter the new value for that type of minion (Animal Companion, Paladin Mount, etc.). If tis class variant does not get that type of minion, enter -1."
From the documentation for the Pathfinder editor.
"Class Variant
Variant Classes modify the properties of a class. In various places, they are called "Variant Classes", "Class Feature Variations", "Alternate Class Features", or "Racial Substitution Levels".
* Every Variant Class must have a "Class To Modify" selected.
* If a Variant Class modifies only one level of a class, enter that level in the "Variant Class Level" field. If it alters all the levels of a class, leave this value blank. If a level is selected, any modifications to the Hit Dice or Skill Points are only applied to that level. All other modifications will apply to all levels.
* If an aspect of the class has not changed, there is no need to enter any values for the class modification. For example, if this class variant gets the same number of skill points per level as an un-varied member of this class, the "Skill Points per Level Override" can be left blank.
* If information in an array (ex: the number of bonus feats per level) or a matrix (ex: the number of spells known) is changed by a variant class, only the difference needs to be entered. For example, if a class receives one fewer 2nd-level spell known at 4th level and thereafter, in the matrix, column 2 is the 2nd-level spells, and the 4th row down (labeled "3") represents level 4. Enter -1 in this box. HeroLab will assume that a value you enter applies for the rest of a column, so in this case, the -2 2nd-level spell known will be applied at 4th level, 5th level, and so on.
* If the Variant Class receives a minion at a different level than the normal class does, enter the new value for that type of minion (Animal Companion, Paladin Mount, etc.). If tis class variant does not get that type of minion, enter -1."