There are some bug fixes and minor changes along a big one. Installation engine was changed to Inno Setup. This was done in order to support both 32-bit and 64-bit installations in same file and to enjoy quite nice features. Which ones? I will probably write a post or two later.
This change requires installation to first remove any old versions. I have tested procedure with versions 1.31, 1.40 and 2.00. If you have other version installed I would advise to uninstall it first since installation may not uninstall it automatically.
In case something goes wrong with uninstalling, you end up with two versions of QText in Uninstall dialog. Once that happens, old version will not be uninstallable. Except for that annoyance, everything else should work properly even if that happens.
No damage to your data should happen during uninstall. However if you wish to backup it first, just go Options -> Files -> Open folder. This will open Explorer window. From there you can copy your files anywhere you wish. Once new version is installed, just copy files back. This step is optional since uninstall will not delete any files or settings and install will take them over. All your files should be safe.
You can download it here.