Great, replacing "something that worked, maybe not great, but at least it worked" by "something that seems to hang with a new version of update center but  isn't tested fully".
It seems as Upd. Center is started,  it tries to open a web page that fails to load, which stalls all progress.
License manager opens and closes fast, if I try this manually to check the status of my account.

I am somewhat new to Plus+1.  I received a project file, that I am trying to make a change too.  So I did not create a project/program from scratch.  I have taken the Fundamentals and Advanced trainings, but it was several years ago.  I made a small change to the program and I want to test it on a real world device.  I have made the change and (attempted to) compile the program.  Under the "Error/Warning/Hint Messages" the compiler says "COMPLETE - No specific issues identified".  However, the compiler message is giving me the error seen below, and I am not getting a downloadable plus1 file in my project folder to load into the ECU.  Has anyone seen this?  I am not ruling out an IT related measure that is preventing this from completing, since I have run into that already too.  Any help would be appreciated.

I've used a mini PC without a screen. CG150 connected. AnyDesk to connect and operate (uses a password). You can add a VPN if you think necessary. Use local Wi-Fi or a 4G stick. You can get the PC to start up if supply is applied but you could get the operator to power up the Mini PC as I see this as a good safety precaution, especially if you are manipulating parameters.

Curious if anyone has a DIY solution for mobile/4G remote access to connect to a device with the Service Tool?

Previously I used the CS500 for connection remotely to a device with the Service Tool, this worked as intended and the price was reasonable.

Now that the CS500 is discontinued the recommended alternative is the Proemion product, however pricing I have received for the hardware and the subsequent subscription/token for the data/connection is outright ridiculous and not a viable solution in my opinion, especially in a fleet situation, there is no reduction in costs for the Proemion subscription/token the more you have, unlike the Danfoss Connect where you could have multiple devices, Proemion want to charge you for each 'connect portal' the full amount each regardless how many devices are being used, all i want is access to the service tool, i don't require their portal and logging features.

My DIY solution is the use of a 4G Ewon Cosy (This is a remote gateway that creates a VPN), with the enabling of the USB over IP feature of the Ewon I can then plug the CG-150 to the USB port of the Ewon and connect the CG-150 to the Danfoss CAN device, the link can be seen made on the Service Tool, I have tested this working.
(Perks of the Ewon is the price and basic/free subscription that has enough features for my use case, so the only ongoing cost is a 4G Mobile Data plan)

Initial testing of the solution I found that the Service Tool link was 'slow' with the status alternating from Connected to Disconnected, the CAN status LED on the CG-150 was flickering slow and the Log period status 'Feedback' was registering very high 800-1000 range.

Some obvious latency happening here, I can ready values and make changes to parameters in the Service Tool program, however I don't think I would be able to push a new program to a controller with this amount of latency/lag, I haven't tested that part yet.

I figure to combat this I could adjust some of teh settings in the Service Tool > Communication (tab) > Manage Protocols, in particular KPW2000_STMin and AddTimeOut

Thoughts?

It would seem you are doing everything correct.

Have you got a screen shot to share?

There is no difference from the old to new displays when using the Vector-Based Screen Editor, unless you have been using the Classic Screen Editor i dont know how this differs