I am running the Linux v. 5.1.3 (Correcting typo. Sorry) of KMyMoney.
Under Settings/Configure KMyMoney/Plugins, I have KBanking appearing. I have checked the box next to it. I am unable to edit settings for it or use it. What am I doing wrong?
Thanks for your help.
[I thought I replied by email, but it hasn’t shown up yet - hopefully it wont end up being a dupe]
Hopefully you mean 5.1.3 or else you seem to have a time machine available.
The checkbox in the plugins section of the configuration dialog simply enables the feature. I don’t use it, but as far as I know, any configuration happens when you map an account to an online account. When you do that (Account/Map Account… menu item) you should get a dropdown with all the possible online plugins, which should include KBanking (and probalby also the OFX based on libOFX.) If you choose KBanking there, I believe you will see the relevant options. Then, once you have the account mapped, editing the accounts should include a tab for Online Settings.
Do you see the menu item Settings/Configure KMyMoney/Configure AqBanking ? That is, where you setup your online access for the KBanking plugin. Once that is done, you can map your KMyMoney account to this online account as @ostroffjh explained.
BTW: which protocol (e.g. OFX, HBCI, …) do you need to access your bank online?
Unfortunately “Configure AqBanking” does not appear as an option in Settings/Configure KMyMoney (Linux, v. 5.1.3). Have I done something wrong?
My bank provides CSV files which I manually import. I am going to see if I can prevent importing the Memo field (So many new things to learn! It’s fun.)
My credit card company provides QIF files which I can manually import.
Thank you very much for the help.
In case the Configure/AqBanking menu item does not appear, you probably have not installed the AqBanking package and its companion Gwenhywfar. Those are packages also used by other finance programs e.g. GnuCash.
I have not used the 5.1.3 version for a long time (I live on the bleeding edge) but can’t you create a CSV profile where you don’t assign the memo column so that it is not imported?
Thanks for the suggestions. I installed AqBanking and Gwenhywfar, but still no joy. Nothing shows in the configure window. 
I tried reinstalling KMyMoney afterwards, but it made no difference.
What distribution are you using? Did you install KMM from their package manager, or some other way? If their version is not handling dependencies correctly, I would suggest posting to one of their forums or mailing lists.
In the meantime, have you tried launching KMM from command line to see if there are any errors output to console?
Separately, have you tried using an Appimage? https://kmymoney.org? the BEST Personal Finance Manager for FREE Users, full stop. | KMyMoney
I tried your suggestion to open KMyMoney it via the terminal. The result was a whole new installation of KMyMoney. I went ahead and set up a new file using it. THAT installation worked for KBanking and AqBanking. I then saved it to use next tax year (2024).
I closed it and opened this year’s file I have been working on up until now. Although I have not yet tried it, the AqBanking importer shows up under /File. Progress! 
Thanks for your help, everyone. I’ll let you know how it works.
Again, please let us know which distribution you are using, and where you installed KMM from. I can not think of any way that running the program from command line/console would create a new installation. Why you think you have a new installation, and how does it differ from the original one?
On a totally separate note, why do you create a new data file for each year? There are some of us with more than ten years of data in our files, and performance is still perfectly acceptable. You can easily filter ledgers to not show any data prior to 1 Jan of the current year, and most (all?) reports have current year only options.