Softube Modular is a fantastic synth but I’ve had trouble getting some sizing that I could actually see while using it in FL Studio. Here’s what you need to do to resize it to a workable level.
I have a 4k display resolution on my monitor while using FL Studio and Softube Modular looks like this initially:

It is way too small to be able to see and is unusable for me.
Here is what I changed to make it larger.
Initially, it had this setting in the “Settings” tab. Access it by clicking the plug and gear icon at the top (circled in the image below).

See how the “DPI aware” and the “Scale editor dimensions” radio buttons are on? Turn them off. Then click the “Reload plugin” button (not circled above, but you can find it under the word “Latency.”
After the plugin reloads, it should look like this:

Pull on that little staircase in the lower right (see the arrow in the image above) to resize the window, and you’ll get something that looks like the above image.
Now this is a size that is workable and usable.
