An application does not require installation, you just need to unpack all files from the ZIP file. However, OS windows might have an extra limitations applied to software downloaded from the web. Make sure to unpack files onto a folder on drive D: if possible. If you pick a drive C: or especially your desktop folder (C:\users\....) you are likely to get an application that will be unable to start because of Windows blocking some of functions.
Second, you should start zmodeler3.exe as Administrator when you install license. It was not a case on Windows7 and Windows8.1 but it seems to be a must on Windows 10.
Trial license can not be installed manually via copy+shift method as specified in web account. However, you are allowed (and strongly advised) to configure "automatic online validation" (viewtopic.php?f=21&t=5711
) - this is the page you get onto if you click "online validation" in web account on your license information page.
Automatic license installation/validation requires zmodeler3.exe to be able to reach *.zmodeler3.com domain (via regular HTTPS, like opening a web page in a browser). If you run ZModeler and see a "Searching for updates" icon (spinning circle) in the bottom of ZModeler window spinning forever, then ZModeler is unable to reach updates/license server and will be unable to download license.
Once license is installed (automatically or manually) it is valid for a period of validation (about 6 days), so you can go offline and ZModeler will still be working; after the specified days count license will require to be re-validated. ZModeler will refresh validity automatically if online validation is configured; if it's not, you should supply new validation key by pressing "Validate" button in web account. Pressing Validate button gives you a validation key for offline validation, it does nothing with license itself, so you have to copy this validation key and "Shift" it into License Information window of ZModeler (by pressing and holding Shift key for 2-3 seconds). Once again - configuring automatic license validation eliminates all this boring stuff up to license expiration. Mind, the validation key for 32-bit version and for 64-bit version are different, so if you use 32-bit version of ZModeler, you have to specify you need a 32-bit validation key before you press "Validate" button. You can get as much validation keys as you need, no problem on this.
ZModeler is very sensitive to its files alternation or inaccessibility. For example, you can not run two instances of ZModeler at a time, as one instance will lock/block some files and another will be unable to read and use them. This is the case when ZModeler starts but reports "License denies this action" which is mostly a message about inaccessible (locked or blocked) license file. Mind, if you get an application crash at some point, it might happen "zmodeler3.exe" process is still running in background and still blocks some files. It is recommended to reboot PC if you get any problem with license being inaccessible ("License denies this action").
Your platform ID "HTNXX-XD" is not assigned a password in web account, so I assume online validation is not configured. I advise you to do so and report here whether license issue will get solved or not.
All customer support one can get is the forum posting and reaching me by e-mail specified in an application. I do reply to each and every post here on forum and to every e-mail I get. It might take more than 24 hours in some cases, but you are free to send another notification if I miss to reply to some message sent me earlier, no problem on this.
P.S. The application is not claimed to work on any of end-user hardware or OS environment. It is supplied as is, you are not advised to use paid license until you have succeeded with installing trial license and testing software for a while. it is explicitly stated in terms and conditions that you accept before purchasing license. I can not guarantee an application to work on each and every hardware/software configurations, there could be still cases when I could do nothing to locate and fix a problem that prevents application to work for some user(s).