Installing EA in MT5 (Mac) suddenly does not work anymore

Hello all,

I usually load a new EA in *mq5-format into the data folder MQL5->Experts, re-start MT5 (Mac) and then an additional *ex5-file will be created and the EA is appearing.

From one day to another this way does not work anymore. When I insert the *mq5-file nothing happens. It will not be compiled to an *ex5-file automatically anymore. Therefore the EA does not appear in MT5.

Does anybody from you knows the reason?
I want to repair my MT5 to exclude that there are other bugs, too.

Thanks for your help in advance.
Marco vd Heijden  
Did you try to compile it with MetaEditior manually?