hello, can you pls write me to our email at
support@rupostel.comi can check your site directly.
the problem is that previous OPC's stored this value in a file and the strings were urlencoded. now the strings are stored in the database and there are a few steps which opc does to migrate them from the orignal format to the new format.
i would like to see your site to learn where the migration process failed.
the very important step upon opc creating a new config is to click save after opc installation. if you missed this step upon any opc installation it could had missed the migration and thus it could had skippped conversion of these values, but without checking your site i cannot advise further in this matter.
best regards, stan