[3] On 13 July 2017, newly promoted Danish Superliga-side FC Helsingør signed Køhler on a two-year contract.
[6] After one year in Sweden, Køhler returned to Denmark and signed a one-year deal with newly relegated Danish 1st Division club Esbjerg fB.
[7] On 26 March 2021, three months before time, Køhler's contract was terminated by mutual consent after only playing six games for the club.
[11] On 30 January 2023, Køhler returned to Denmark and signed a deal until June 2024 with Danish 1st Division club Fremad Amager.
[14] Besides that, Køhler would also spend time on his two businesses: one, together with his former teammate Emiliano Marcondes, where they run Visionary workshops for young athletes on building an identity that is not only based on performance on the pitch.