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XDS
WTF? Like what ?
So that You have an English browser.
A browser without translatable menus would have been French or whatever - there are no English K-Meleon developers.
Like: in English.
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XDS
How ... am I supposed to delete indivisual entries threw the history file
You can use any editor if You want to edit the history file and You can use an editor to delete individual entries through the history file.
You can delete the whole history via View > History > Delete History.
AFAIK History can be also cleared via Privacy Plugin.
And If You are only accustomed to use and have Firefox managers feel free and try to implement them for us.
BTW. Broken things can be grayed out also - K-Meleon can have bugs like any other software. The advanced history settings menue which seems to have lost contact to its plugin (and is probably grayed for that reason) does not help You with Your history editing problem.
Configuration values can normally also be accessed via about:config. The default values for keeping history that are visible via about:config and in the grayed entries in Advanced Settings. History is kept for 9 days. You could probably toggle this value to zero days in/via about:config. That way You get rid of older history also - if there was no other way.
And I am sorry I have no idea about what ancient history entries You are talking.
p. s. stop swearing while addressing me.