I cannot open nor update a year old MT4 installation

New comment
 

I did not manage to open a year old (resting) MT4 terminal installation. It opens but terminates a second later, however the log shows activity for 19 seconds.  It makes me not much harm, but obviously something failed with the (MQ weird) update. Is there any reason launching the build 500 ends in crash instead of update?

The log reads:

06:54:59 MetaTrader 4 build 500 started (MetaQuotes Software Corp.)
06:55:01 Code Base: failed send request to server 'codebase.mql4.com' [404]
06:55:06 Main pumping: timeout on stop
06:55:09 Main pumping: timeout on stop
06:55:12 Main pumping: timeout on stop
06:55:15 Main pumping: timeout on stop
06:55:18 Main pumping: timeout on stop
06:55:18 Main pumping: terminated
06:55:18 MetaTrader 4 build 500 stopped
New comment
Reason: