@Oldrider No, you can use any module but it may not be plug and play. If you are OK with soldering or crimping a cable together and possibly drilling some holes in the acrylic to mount the module then there will both work.

@Oldrider They are not EleksMaker laser modules, notice how Banggood say they are compatible or "for Eleksmaker" not that they are the EleksMaker products.

Here is a genuine module for comparison:
https://www.banggood.com/EleksMaker-EL01-2500-445nm-2500mW-Blue-Laser-Module-PWM-Modulation-2_54-3P-DIY-Engraving-Machine-p-1179592.html?rmmds=detail-left-hotproducts__3&cur_warehouse=CN

This is the bracket you need (probably came with the machine) and it is not included with the laser module. You could also attach the module directly to the X-axis assembly but you may need to drill some holes.

@Ripton This is a genuine EleksMaker laser module, if it isn't light blue anodized with their name etched on the side it is a copy:
https://usa.banggood.com/EleksMaker-EL01-2500-445nm-2500mW-Blue-Laser-Module-PWM-Modulation-2_54-3P-DIY-Engraving-Machine-p-1179592.html?rmmds=search&cur_warehouse=CN

@Oldrider Post a link, from the name it is impossible to be sure as so many fake modules are for sale.

@upmike I use USB2.0 and USB3.0 ports on my computer, no issues with T2Laser and the driver I provide. I suspect the original USB1.0 would work too but I don't have any dinosaur computers to test it.

@Ripton Have you purchased a genuine Eleksmaker laser module? It sounds like you are missing the adapter plate or something, perhaps if you post a picture it would help.

@Nicholas-Bentley Have you installed the device driver from T2Laser / Help menu? Upload a screenshot of the device manager COM driver. If the COM driver is correct and you can't upload firmware using the menu in T2Laser or using Nano+ mode as explained on my website then yes you probably bricked the Nano. A replacement is very cheap (around $3) or you can get an AVR programmer and reload the bootloader.

@T4 Are you able to connect to the machine and manually jog the axis, turn the laser on/off etc?

If you download the T2Laser trial I can help you with the steps to get it working.

@savant218 You don't, it is obsolete software that has many known bugs and doesn't support Grbl 1.1. There are much better alternatives available. I wrote T2Laser as a replacement.

@stoikyo Yes of course, that's the main purpose of T2Laser to load an image and generate G-code, you can also load DXF from these drawing programs.

Do not load G-code from other sources, it is usually not correctly formatted for these machines and will not work as well as T2Laser.