MT4 overwriting two files metaeditor.exe and terminal.exe does not work anymore?

[miky]

I do use /portable  mode on MT4 (multiple instances), and do try to update today just by overwriting two files metaeditor.exe and terminal.exe with newer versions from resent build. And for some reason MT4 can not connect even with new builds. Anyone having similar issues?

[lippmaje]

Maybe your build is too old. From March 1st on some older builds are not allowed to connect to the trading server.

https://www.mql5.com/en/forum/302371

[miky]

Just now noticed in "Journal" tab there is some sort error "MQL Base: failed write to base" . Some time ago , have been editing "folder permissions" of C:\Users\mike\AppData\Roaming\MetaQuotes\WebInstall to avoid unnecessary updates. It worked fine with old MT4 builds, but builds from 1118 do needs some sort of different-default folder permissions. 

[lippmaje]

Upgrading by merely swapping executables is not the best practice...

[nicholish en]

I wrote a utility to automatically installs multiple terminals in a portable directory and simlinks the [MQL, history, Sounds, templates] directories so a change in one syncs to all. Using this method allows the terminals to update themselves without the risk of messing up everything. https://gitlab.com/nicholishen/Vanilla-MT4/blob/master/Vanilla-MT4-v0_0_2.zip