Bug in the .ui file

[Momergil]

It should be fairly possible to fix the ui file (assuming basics of xml, and Qt Designer Properties)

Try comparing the old and new ui files using a text compare tool.

As I don't know to what extent your ui file is corrupted, it is difficult to say extent of recovery that can be done.

It shoud be possible to zip the ui file the attach in the post, unless you don't want to put the ui file in public.

Well, it would be fairly possible if any mistake could be seen :X I tried comparying the oldest backup version with the current bugged .ui and had little success identifying differences: the greatest of them were in natural difference that came with the development, and the unique strange difference was in the encoding of special characteres (~, ç, etc..) which were some times different from one file to the other. But after changing the new .ui file to the older's way of writing theese special characters, nothing changed. In fact Qt Creator pointed out a specific line and column were the mistake is supposed to be, and I found nothing at all there:

<property name="prefix">

<property name="prefix">

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(Column 16 would be the first "r" of "property")

Edit: I tried to attach a .rar file of mainwindow.ui, but once again the forum didn't allow me affirming that it was a "invalid file".