Hello!
Wow that was a fast reply. Well then...
The version of MX I'm using has XFCE as a desktop.
I have checked the file browser depends you listed.
Per default "yad" version 0.40.0-1 is installed (doing what I think is the same as what you listed. qarma and Matedialog is not even available to me. I do however have zenity v 3.30.0-2 available in the repositories.
Ok, after som testing I installed zenity and zenity common and it now opens file save dialogue. Great!
But It still will not stop presenting the settings window despite splash (which is what you mean I think) set to off in settings. But this is a minor thing, not compared not being able to save.
Beyond this I really like the program and what you are trying to do here. I would however like to see tasks which could be repeated after completion on various times; hourly, dayly, weekly, monthly, yearly and so on. I would not mind a few more types of lines and arrows either. This way you could use the program to make flowcharts. Maybe color them too perhaps?
Thanks for the help. The program is now functional in my view. Hope for lots of cool upgrades in the future. Also please do not stop supporting this version outside of Steam, which sadly happens too often (with games). I like to have a portable version of the program on a usb-stick.