v1.0.1 does not open MX configs from v1.0.0 anymore

I just did a test on my Windows and I can't reproduce this.

What operating system are you using?

And just to make sure:

You're creating a project in 1.0.0 and then you open it in 1.0.1 and when you try to edit in the .ioc file you get stuck at "Initializing Device Configuration Tool", right?

That is right.

I'm using Mac.

The project is configured with USART1 and USB CDC (STM32WB55).

I am having this same issue as well, and I am using Mac OSX 10.14.5

I was able to open the MX file if I edited the .ioc file to bump the version numbers. I made the following changes:

MxCube.Version=5.2.0 ==> MxCube.Version=5.2.1

MxDb.Version=DB.5.0.21 ==> MxDb.Version=DB.5.0.21

However, I do not know if this introduces any new errors, so proceed with caution.

I have just installed this on a Mac to see if I wanted to move from SW4STM32. I installed V1.0.1 and made a test project. Then I was told that there was a version 1.0.2 so I installed that. Now it hangs trying to open the ioc as the OP describes.

Same issue with 1.1. Is anyone fixing bugs?

Same problem with MX version 5.4.0. How do I find out what the correct MxDb.Version should be set to? Is there anything else I need to do to convert an '.ioc' file?