Update/crash fix for Blender 4.4

[rpgplayerrobin]

When trying to export on Blender 4.4, it crashes in this file (shown in the system console) and then has no UI in the export dialogue.

This commit fixes that and with this fix it works to export in Blender 4.4 successfully.

See more about why this is needed here:
https://developer.blender.org/docs/release_notes/4.4/python_api/

[paroj]

did you check with master? it sounds like #259 already attempted to fix this and we only need one of them.

I am in favor of reverting #259 as this is more clear.

[rpgplayerrobin]

You are correct, that version also works.
I just downloaded the version for 4.3 and tried that on 4.4, which of course failed.
But I should of course have downloaded the latest code from here instead.

I am unsure which version of these two are the best.
Mine keeps the same system as it was before, since before 4.4 the __init__ function was automatically called for all inherited classes, but now with 4.4, you must specifically call them yourself instead (which this commit does).