MATLAB: Repeated error when opening m-files – R2015b

can't reload (windows)m-filemm_rmidd_mi.dll

Whenever I open a saved m-file I get the following list of errors. It doesn't matter if it is a file from a previous computer or a newly created one. I have tried reinstalling MATLAB, including complete uninstall, computer restart and new installation. I checked, the 'mm_rmidd_mi.dll' file does exist in the designated folder. Here is the error list I get:
Can't reload 'C:\Program Files\MATLAB\R2015b\bin\win64\mm_rmidd_mi.dll'
Error in rmidata.RmiData
Error in rmiml.RmiMlData
Error in rmiml.RmiMlData.getInstance
Error in rmiml.getAll