So, you want to convert your old (or new!) pack of .ini levels to new-formats NeoLemmix, namely the .nxlv format, so that they can be played in NeoLemmix as well as (Super)Lemmini(Too).
There are a number of ways this can be achieved, but here's the way I do it. Everything you need for this method is attached to this post:
1. Create a backup of the .ini levels that you want to convert
2. Create a New Folder on your Desktop and name it "Converted Levels" (or something you'll remember later)
3. Open the NeoLemmix 10.13.13 Editor (a copy of this editor is attached
here)
4. Go to Tools > Mass Format Converter
5. Click "Add Files" and browse to the levels you want to convert
6. Select all the levels you want to convert (you can select multiple levels at a time) and click "Open". The converter will be populated with all of the levels you want to convert
7. Click the "..." button next to Output Directory, and browse to the "Converted Levels" folder you created on the Desktop earlier. This is a neat way to keep the converted levels separate from the originals, and will make the next few steps of the process much easier
N.B. Make sure that Delete Source File is UNCHECKED - you should NOT delete the source file as this will delete the original level8. Go ahead and hit "Convert." The conversion process should only take a few seconds! Once done, it's worth opening your "Converted Levels" folder on the desktop to check that the resulting .lvl files are all there
From here, head to
this topic for instructions on how to convert from .lvl to .nxlv.
Also see
troubleshooting if you're having problems with the conversion process.