Making a change in appdesigner when deployed permanent

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Hello. I have an app that controls several external devices using the comms port and serial communication. I use the same app on about 5 different computers and the comms ports are always different.
For each of my external devices, I use a drop down to select the comms ports (i.e. Com2) but set the default value. But when I run the app on a different instrument, I need to go to all the drop downs and select the relevant comms port.
(My app is compiled by the way and the target computers have the runtime compile installed)
My questions are:
1: Can I get the default value (of the dropsown box) to change and be permanent after I first change it.
2: If not, can I use a file to read in at startup, so this inititalisation text file can be changed for each computer ( do you read a file from the actual deployed directory)

Accepted Answer

Timo Dietz
Timo Dietz on 3 Dec 2020
You have to use "load" / "save" functions to store and reload your settings.
The app does not support permanent changes of the compiled code.
Jason on 3 Dec 2020
Actually, mfilename doesn't work for deployed apps (i.e. an EXE created)
It returns this, but my actual exe is in C:\Matlab\EXE\
Timo Dietz
Timo Dietz on 4 Dec 2020
Good point. I'm not sure whether I'm allowed to put external links here but you can search the internet for this.
I found one idea which sends the 'path' command to the system and just checks the latest entry - which should be the app execution path. Sorry for not being more pecise.

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