Template editor

Hi,

Somehow my mailpoet3 editor environment has been mixed-up.
If I open the editor and select a template, then the textbox has the wrong margins
I have deleted all mailpoet tables, and the plugin, but the problem comes back after reinstalling mailpoet.
So to me mailpoet does store a template somewhere locally containing the wrong values for the margin for <p>
The strange thing is that if I restore the database, the problem still exists!!
Does mailpoet cache the template settings for the editor somewhere on the drive ??
I have been looking in the upload folder but cannot find anything related to mailpoet
If I look with inspector it indicates the following value
mailpoet_content p {
line-height: 1.6em;
font-style: normal;
font-weight: normal;
padding-left: 140px;
padding-right: 140px;
}
https://hospiceamandi.nl/wp-content/plugins/mailpoet/assets/js/newsletter_editor.3c3003a1.js
It does have a value of
.mailpoet_content p {
line-height: 1.6em;
font-style: normal;
font-weight: normal;
padding-left:0px
padding-right:0px
}
Where does the value 140px come from ?????
Urgent help needed !!